Volumes Practice Test 2

Question : 11 of 40

Marks: +1, -0

96 equal circular plates, each half a centimetre thick are placed one above another to form a right circular cylinder of volume 7392

cm^3

. Find the radius of each circular plate.

Solution:

Here, height of the cylinder = 96 ×

1/2

= 48 cm
Hence,

πr^2

× 48 = 7392
⇒

r^2

{7392}/{22×48}

= 7 × 7
∴ r = 7 cm

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