JEE Main 9 Apr 2019 Paper 2 Solved Paper

A water tank has the shape of an inverted right circular cone, whose semi-vertical angle is tan−1 (

1

2

) . Water is poured into it at a constant rate of 5 cubic meter per minute. Then the rate (in m/min), at which the level of water is rising at the instant when the depth of water in the tank is 10m; is: