The diameter of the top of a firebrigade...

The diameter of the top of a firebrigade pump is 5 cm. Water is thrown by this pump at a horizontal speed of 18 m/s on a wall. If water rebounds back from the wall, then the force exerted by water on wall will be :-

`2.35xx10^(5)` dyne

`5.76xx10^(6)` dyne

`6.36xx10^(7)` dyne

`12.72xx10^(7)` dyne

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