Question

24.
The radii of two right circular cylinders are in the ratio of 2:3 and their heights are in the
ratio of 5:4 Calculate the ratio of their cursed surface areas an i ratio of their volumes
OR
A toy is in the form of a cone mounted on a hemisphere of cominon base of diameter 7 cm.
22
If the height of the toy is 15.5 cm, find the total surface area of the toy Take = = =
An observer 1.5 m tall is 28.5 m away from a chimney. The angle of elevation of the top of
the chimney from his eyes is 45°. Find the height of the chimnev.
26.
Find the ratio in which the point (-3. p) divides the line segment joining the points
(-5.- 4) and (-2,3). Hence find the value of p.
27.
Prove that the diagonals of a rectangle with vertices (0,0). (a. 0),(a, b) and (0, b) bisect
nach other and are equal.​

Answer 1

ans) csa of the cylinder = 2πrh

2×π×2×5/2×π×3×4 =5/6

Answer 2

Answer:

let the radius be 2x & 3x

let the height be5x &4x

curved surface area =2pie*2x*5x/2pie*3x*4x

=10:12=5:6

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