A large open tank has two holes in the wall. One is a square hole of side L at a depth y from the top and the other is a circular hole of radius R at a depth 4y from the top. When the tank is completely filled with water the quantities of water flowing out per second from both the holes are the same. Then R is equal to
Velocity of efflux when the hole is at depth h,
Rate of flow of water from square hole
=
Rate of flow of water from circular hole
=
According to problem