S.No.
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Ncert solutions for class 10 maths
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1 | Real Numbers Text Solutions Video Solutions |
2 | Polynomials |
3 | Pair of Linear Equations in Two variables |
4 | Quadratic Equations |
5 | Arithematic Progressions |
6 | Triangles |
7 | Co-ordinate Geometry |
8 | Introduction to trigonometry |
9 | Some Applications of Trigonometry |
10 | Circles |
11 | Constructions |
12 | Areas Related to circles |
13 | Surface Areas and Volumes |
14 | Statistics |
15 | Probability |
Friday, 15 February 2013
ncert solutions for class 10 maths
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thanQ sO much deepak siR.. !
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Q. If a cone of radius 10cm is divided into two parts by drawing a plane through the mid point of its axis, parallel to its base. Compare the volumes of the two parts.
ReplyDeleteAnyone pls solve this question.
Let the vertex is of <A
DeleteVolume of the cone separated from original cone = 1/3 πr1²h1( h1 = 5 cm),
tanA/2 = r1/5
r1 = 5 tanA/2
Similarly radius r2 of original cone = 10 tanA/2
Volume of original cone = = 1/3 πr2²h2
So substituting the value of r1,r2, h1 and h2 and then we get the the ratio of their volume
Volume of the frustum ( another part of the cone ) = 1/3 πr2²h2-1/3 πr1²h1
= 1/3 π( r22h2 –r12h1)
= 1/3 π(100 x tan²A/2x10-25xtan2A/2x 5)
=1/3 πtan2A/2(1000 -125)
==1/3 πtan2A/2( 875)…..(i)
Volume of the cone separated from original cone =1/3 πtan2A/2(125)…..(ii)
From (i) and (ii) we get= 125/875= 1 : 7
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ReplyDeletegood jobb. but iam unable to open chapter 5 to chapter 15
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Hey I can't open from 5 to 15 what is this
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ReplyDeleteFind the zeroes of the following quadratic polynomial 8t^2+2t-15 and verify the relationship between the zeroes and the coefficients.
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