Students and Teachers Forum

1. Joule is called derived unit because it is formed by the combination of:
  1.   kg,m and s2
  2. kg,m2 and s2
  3. kg,m2and s-2
  4. kg,m and s-2

Joule is called a derived unit because it is formed by the combination of .....

2. निबन्धलेखन :

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3. What is g/cm3?

Gram per cubic (g/cm3)centimetre is a unit of density in the CGS .....

4. What is qbasic?

Qbasic is a programming language developed by Microsoft for use in MS-DOS operating system. It is the successor of earlier forms of BASIC (Beginners All-Purpose Symbolic Instruction Code), a simple programming language for beginning .....

5. सर्वनामको प्रकार :

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6. A train covered a certain distance at a uniform speed. If the train would have been 10km/hr faster it wouki have taken 2 hours than the scheduled tirfe und if the train was slower by10km/hr it would have taken 3 hours than the scheduled time . Find the distance covered by train.

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7. Solve: x3- 3y=6, 5y+ 6x =28

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8. Solve this equation using the method of substitution:
20ax - by = ab and -5ax + 3by = 52ab

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9. Solve:  x3- 2y=1, x4+ 3y =3

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10. Inside rectangle ABCD, there are the right triangles AED and BFC, as shown in the picture. Note that point F is located along DE. If AE= 7, ED = 24, and BF = 15, what is the length of AB?

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11. Trigonometric ratios of compound angles (A + B) and (A - B).

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12. Compound angles:

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13. If sinA = 35 and sinB = 1213, find the value of sin(A + B) and tan(A -B).

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14. Prove that:
sinA + sinA+ 2π3 + sinA+ 4π3 = 0.

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15. If cosα = 45 and cosβ  = 752, prove that (α + β) = π4.

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16. Prove that:
1 - tan22°. tan23° - tan22°- tan23° = 0

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17. Prove that:  cos2(A + B) . cos(A - B) = cos2A - sin2B = cos2B - sin2A

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18. Mention anyone funtion of Transparency International.

The Transparency International defines corruption as the abuse of entrusted power for private gain. It works as an agent to fight the corrupt practices by pressuring governments, businesses and the powerful to take strong action .....

19. The 5th term of an A.P is 28 and 9th term is 48. Show that 95 does not belong to the A.P.

Here, t5 = 28 or, a + (5 - 1)d = 28 or, a + 4d = 28...............i) And, t9 = 48 or, a + (9 - 1)d = 48 or, a + 8d = 48........ (ii) now solve these two equatioins and find a and d. Then  Again use,  95 = a + (n - .....

20. What are the two diseases caused by fungi?

Fungi are everywhere. There are millions of different fungal species on Earth, but only about 300 of those are known to make people sick. Fungal diseases are often caused by fungi that are common in the environment. Fungi live outdoors in soil .....

21. Find HCF and LCM of:
49x³ - 36x, 14ax + 12a

Here,  1st expression = 49x³ - 36x = x (49x2 - 36)                                              = x(7x - 6) (7x + 6) 2nd .....

22. How are we responsible for any unfavorable events happened in our lives

Well, unfavorable events are sudden happenings. They occur unexpectedly. Sometimes, they may occur due to our negligence. We may encounter them if we do our work having alcohol. They may occur due to our self-centeredness. Similarly, .....

23. A news story about any theft or dacoit

Man arrested in Kuleshwor for stealing roommate’s wallet
6th August
Sarmila Pathak
A man .....

24. The 3rd and 13th term of an A.P. are 40 and 0 respectively which term of the A.P is 28?

Here, t3 = 40 or, a + (3 - 1)d = 40 or, a + 2d = 40...............i) And, t13= 0 or, a + (13 - 1)d = 0 or, a + 12d = 0........ (ii) now solve these two equatioins and find a and .....

25. Find the distance between: r(a,b) and s(b,a)

Here,  Let, (x1, y1) = r(a, b)         (x2, y2) = s(b, a) We have,  the distance formula √ (x2 - x1)2 + (y2 - y1)2 Use the formula and calculate you will get the required .....

26. Fond the distance between m(-2,1) and n(2,-1)

Here,  Let, m(-2, 1) = m(x1, y1)           n(2, -1) = n(x2, y2) We have,  the distance formula √ (x2 - x1)2 + (y2 - y1)2 Substitute the value and use the above formula you will get the .....

27. Find the distance between:
e(4, -2) and f(5, 5)

Here,  Let, e(4, -2) = e(x1, y1)          f (5, 5) = f(x2, y2) We have,  the distance formula √ (x2 - x1)2 + (y2 - y1)2                     .....

28. Write some of the name of the organization in our locality and their objective

The table below shows some of the local organizations with their main objective. Name of the Organizations Objectives Biogas Support Programme To assist villagers for Biogas production Ashal Chhemeki To establish .....

29. समावेशीकरण भनेको के हो?

समावेशीकरण सामाजिक, आर्थिक तथा राजनैतिक रुपले पछाडि पारिएका वा बञ्चितीकरणमा परेका वर्ग र .....

30. If the volume of a hemisphere is 686pi÷3 find its curved surface and total surface area

Here,  volume of a hemisphere =  (686pi)/3 We, know, Volume of a hemisphere(V) = (2 / 3) π r3                                         .....

31. if the radius of a sphere is reduced to one -third, by how many times does its volume decrease

Here,  We know volume of sphere (V) = (4/3) ⨉ π ⨉ r3 Radius of a sphere is reduced to one -third So,  volume of sphere (V)  =  (4/3) ⨉ π ⨉ (r/3)3                 .....

32. If the volume of a spherical ball is 38,808cm cube find its surface area.

Volume of sphere = 4/3×π×r3 = 38808. from that we get r=21 And by applying Surface Aarea of sphere i.e, 4×π×r2 So, = 4×22/7×212 = 5544 The surface area of spherical ball is .....

33. If the surface area of a sphere is 5,544cm square, find its volume

The surface area of sphere = 5544 cm2 4πr2 = 5544cm2 4 × 22/7 × r2 =5544 r2 = 441 r = 21cm Now Volume = 4/3πr3               = 4/3 × 22/7 × 21 × 21 × 21   .....

34. हाल कृषि क्षेत्रको योगदान कति रहेको छ?

नेपाल एक कृषिप्रधान देश हो। झन्डै ७०% जनसङ्ख्या कृषि पेशामा आवद्ध रहेको छ। तथापि कुल गार्हस्थ .....

35. By how many times does the volume of cylinder increase when it's diameter is double

Let the initial diameter of the cylinder be d1. Then, Volume(v1) = Πd12h ∕ 4 By question, New diameter = 2d1 Then, Volume(v2) = Πd2h ∕ 4                     .....

36. The number of volume of a cylinder is half of its number of the total surface area. If the radius of its base is 7cm,find the volume

We have given that, number of volume of a cylinder is half of its number of the total surface area .  radius of its base is 7 cm , And we need to  find the volume. Ler h be the height of cylinder  and r be the .....

37. In a school picnic program certain number of student are present and agree to pay Rs.200 each. If 10 student were absent the price become 10 more in each student .Find total number of student in picnic? 

Here,  Let, total number of students be n  Total amount agreed to  pay by group = 200 n............(i) If 10 students were absent the the price become 10 more in each student. So, Total amount paid by group = (n - 10) (200 + .....

38. Split 69 into three parts such that they are in arithmetic series and the product of two smaller parts is 483. 
[Ans: 21, 23, 25]

Let the first term of the AP be 'a' And the common difference be 'd' Since 69 split into 3 parts such that they form an AP. Let the three parts be (a - d), (a) and (a + d). Therefore, (a - d) + (a) + (a + d) = 69 3a = .....

39. What sort of evil custom is Chhaupadi?

Chhaupadi custom is one of the social evils still prevalent in several far-western districts of Nepal. In this system, while menstruating, women are considered impure. They are forced to live alone in huts or mud cowsheds for seven days, away from .....

40. Who is the present deputy prime minister of Nepal?

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41. If 4cos2x + 4 sinx = 5 , find the value of sinx.

Here, 4cos2x + 4 sinx = 5 or, 4 (1 - sin2x) + 4 sinx = 5 or, 4 - 4sin2x + 4sinx = 5 or, - 4sin2x + 4sinx = 5 - 4 or, 4sin2x -  4sinx + 1  = 0 or, 4sin2x -  2sinx - 2sinx + 1  = 0 or, 2sinx (2sinx - 1) - (2sinx - 1) = .....

42. Prove that: 
1/(tan3A + tanA) - 1/(cot3A + cotA) = cot4A

1/(tan3A+tanA)　-　1/(cot3A+cotA) = 1/[(sin3A/cos3A)+(sinA/cosA)]　-　1 / [(cos3A /sin3A) + (cosA/sinA)] = 1/[(sin3AcosA+cos3AsinA/(cos3AcosA)]   -  1 / [(sinAcos3A + cosAsin3A)              .....

43. Write about the relation of alcohol and Nepali culture.

We know that Nepal is a multi-cultural country. People living in Nepal are from different cultural backgrounds. They have developed their own type of norms and values. They practice their own type of beliefs. The most interesting is that some .....

44. Find the area of the following polygons.

Here,  In right angled △ABC,  AC2  = AB2 + BC2 (using pythagoras theorem) or, AC2 = 1 + 1  or, AC = √2  Area of right angled △ABC (A) = (1/2) ⨉ AB ⨉ BC       .....

45. What type of climate is experienced in southern Europe?

Europe is the second smallest continent. It is known as a peninsula as it is surrounded by oceans and seas on the three sides. Europe lies entirely in the Northern hemisphere. Due to its location in the temperate zone and a very long coastline, .....

46. नेपालकाे ‍पा्कृतिक सम्पदाकाे बारेमा निबन्ध लेख।

नेपालको प्राकृतिक सम्पदा
साथी, प्राकृतिक सम्पदाको विषयमा मुख्य .....

47. Compute the third or upper quartile (Q3) from the data given below.
Marks obtained 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60 60 - 70
No. of students 2 5 7 6 3 2

Here,   Marks obtained No. of students (f) cf 10-20 2 2 20-30 5 7 30-40 7 14 40-50 6 20 50-60 3 23 60-70 2 25  

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48. What is the main characteristic of Mediterranean climate?

Mediterranean climate is found between the 30o and 45o degree latitudes. This climate is often found on the western sides of continents. Mediterranean climate gets its name from the climate found around the Mediterranean Sea. The Mediterranean .....

49. Adaptational features of terrestrial animal

The adaptional features of terrestrial animals are: a. The legs or wings of terrestrial animals are strong and long which helps fast movement. b. The animal like lizard, which climbs on the wall has an adhisive pad on their leg. c. The animals .....

50. Find the LCM of: 
x2 - 25 , x2y - 5xy

x2-25 , x2y - 5xy Here, 1st expression = x2 - 25 = x2 - 52 = (x+5)(x-5) [ a2 - b2 = (a+b)(a-b) ] 2nd expression = x2y - 5xy = xy(x - 5) L.C.M. = .....