A right cylindrical shaped oil tank of height 40 m is completely filled in 20 minutes. If oil filled at a rate of 8π cubic meter per minute, then the radius of the tank is _____.
A
2 m
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B
2√3 m
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C
3√2 m
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D
3 m
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Solution
The correct option is A
2 m Volume of the cylinder = πr2h
Oil in the container = 8π×20
Oil in the container = volume of the cylinder ⇒8π×20 = πr240 ⇒ r = 2 m