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Question
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by
Options:
A .  2V/(vr - v)
B .  2V/(vr + v)
C .  V/(vr - v)
D .  V/(vr + v)
Answer: Option B
Answer: (b).2V/(vr + v)
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