Ques. -23

An inverted conical tank of radius $2m$ and height $4m$ is initially full of water has an outlet at bottom. The outlet is opened at some instant. The rate of flow through the outlet at time $t$ is $(6 \cdot h^{\frac{3}{2}})$ , where $h$ is the height of water level above the outlet at time $t$ . then the time it takes to empty the tank is :

If you're looking to promote your Rank in JEE-MAINS-2015, then go for solving this set : Expected JEE-MAINS-2015 .