Volumes Practice Test 1

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Question : 36 of 40

Marks: +1, -0

The surface area of a sphere is same as the curved surface area of a right circular cylinder, whose height and diameter are 12 cm each. Find the radius of the sphere.

2 cm
4 cm
6 cm
9 cm

Solution:

Here,

πr^2

= 2π × 6 × 12
⇒

r^2

=

{2×6×12}/{4}

= 36
∴ r = 6 cm

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