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Q.

A right triangle ABC with sides 5 cm, 12 cm and 13 cm is revolved about the side 12 cm. Find the volume of the solid so obtained.

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Detailed Solution

Given: Height (h)= 12 cm

Radius (r) = 5 cm, and

Slant height (l) = 13 cm

Ncert solutions class 9 chapter 13-15

We know that, the volume of cone, V = (1/3) πr2h

V = (1/3) × π × 52 ×12

= 100π

The volume of the cone so formed is 100π cm3.

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