Question

A right cylindrical shaped oil tank of height 40 m is completely filled in 20 minutes. If oil filled at a rate of 8$\pi$ cubic meter per minute, then find the radius of the tank.

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Answer 1

Volume of the cylinder = $\pi r^{2}h$
Oil in the container = $8\pi \times 20$
Oil in the container = volume of the cylinder
$\Rightarrow$ $8\pi \times 20$ = $\pi r^{2}40$
$\Rightarrow$ r = 2 m