# A  water jet, whose cross-sectional area 'a' strikes a wall making an angle  with the normal and rebounds elastically. The velocity of water of density 'd' is v. Force exerted on the wall is : 2av^dcos$\Theta$2a$v^{2}$dsin$\theta$2avdcos$\theta$2avdsin$\theta$

The correct option is B ($2av^2d \sin \theta$)