TS EAMCET 7 May 2018 Shift 1 Solved Paper

A cylindrical vessel is filled with water upto the height 1 m from the base. A small orifice is opened at some height in the cylinder and the water level is reduced to height of orifice in 20 sec. If the base area of the cylinder is 100 times the area of orifice, then the height of orifice from the base is
(Take g = 10 m/s2)