_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$?

_The water in a jet propelled boat is drawn through the openings facin

1.	_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$?
A.	2V/(vr - v)
B.	2V/(vr + v)
C.	V/(vr - v)
D.	V/(vr + v)
Answer» C. V/(vr - v)