[Solved] Efficiency of the jet of the water having velocity V & Striking a series if vertical plates moving with a velocity u is given by,

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Q.	Efficiency of the jet of the water having velocity V & Striking a series if vertical plates moving with a velocity u is given by,
A.	[2v(v-u)]/u2
B.	[2u(v-u)]/v2
C.	u2/[v2(v-u)]
D.	none of the above.
Answer» B. [2u(v-u)]/v2

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