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Total volume of three identical cones is the same as that of a bigger cone whose height is 9 cm and diameter 40 cm.

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Total volume of three identical cones is the same as that of a bigger cone whose height is 9 cm and diameter 40 cm. Find the radius of the base of each smaller cone, if height of each is 108 cm.

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Let the radius of the smaller cone be 'r' cm.

Volume of larger cone

Volume of larger cone = 3 × Volume of smaller cone

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