The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

The efficiency of jet propulsion for a ship with inlet orifices at rig

1.	The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by
A.	2(Vr - v) v]/ Vr²
B.	2(Vr + v) v]/ Vr²
C.	(Vr - v) v]/ Vr
D.	(Vr + v) v]/ Vr
Answer» B. 2(Vr + v) v]/ Vr²