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A water tank has the shape of an invertd...

A water tank has the shape of an invertd circular cone with base radius 2 metres and height 4 metres. If water is being pumped into the tank at the rate of `2m^(3)//mm`. Find the rate at which the water level is rising when the water is 3m deep

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The correct Answer is:
`(8)/(9pi) = 0.28` m/min
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