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A reservoir is in the shape of a frus...

A reservoir is in the shape of a frustum of a right circular cone. It is 8 m across at the top and 4 m across at the bottom. If it is 6 m deep, then its capacity is `176\ m^3` (b) `196\ m^3` (c) `200\ m^3` (d) `110\ m^3`

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