A cylindrical pipe has inner diameter of 4 cm and water flows through it at the rate of 20 metre per minute. How long would it take to fill a conical tank of radius 40 cm and depth 72cm?

Explanation

`d= 4 cm`

rate=`20m/(min) = 200 (cm)/(min)`

`r= 2 cm`

volume= `pi*r^2*h `

`= pi * (2)^2 * 2000 (cm)/(min)`

volume of cone = `1/3 pi r^2 h`

`= 1/3 xx 22/7 xx (40)^2 xx 72`

`= 1/3 xx pi xx 1600 xx 72 cm^3`

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