A large open tank has two holes in the w...

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 holes are the same. Then, R is equal to

`L/sqrt(2r)`

`2piL`

`sqrt(2/r).L`

`L/(2pi)`

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