Water flow out through a circular pipe whose internal radius is 1 cm at the rate of 80cm into an empty cylindrical tank the radius of whose base is 40 cm.  By how much will the level of water rise in the tank in half an hour. 

Ram Abhilash Yadav's image
Ram Abhilash Yadav
Nov. 14, 2018, 1:37 p.m.