Water drains out of a vessel filled with...

Water drains out of a vessel filled with water upto height h through a hole of area A in t seconds.If the height of the water is 4 h then how much time will be required for the water to drain out ?[Assume `A lt lt A_(0)` (area of tank ) ]

t seconds

4 t second

2 t seconds

`(t)/( 4)` seconds

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