Efficiency off the jet of the water having velocity V & Striking a ser – McqOptions

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1.	Efficiency off the jet of the water having velocity V & Striking a series of vertical plates moving with a velocity u, is maximum when
A.	1/g (vw1u1 + vw2u2)
B.	1/g[v1u1+v2u2]
C.	1/g[vw1u1??vw2u2.]
D.	none of the above
Answer» E.

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