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A reservoir in form of frustum of a right circular contains  44 x107  liters off water which fills it completely.The radii of bottom and top of reservoir are 50m and 100m. find depth of water and lateral surface area of reservoir?

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Let depth of frustum cone be h

Equating (1) and (2)

Lateral surface area of reservoir = 26145.225m2

Volume of frustum cone

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