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8. 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

(a)   2πL                                               (b)  L/√2π

(c)   L                                                   (d)  L/2π

Answer-b

(10)

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