A particle is projected from the ground with speed u at angle `60^@` from horizontal. It collides with a second particle of same mass moving with horizontal speed u in same direction at highest point of its trajectory. If collision is perfectly inelastic then find horizontal distance travelled by them after collision when they reached at ground

Options

A. `5/8(u^(2))/(g)`
B. `(3sqrt3)/(8)(u^(2))/(g)`
C. `2sqrt2(u^(2))/(g)`
D. `(3sqrt2=)/(4)(u^(2))/(g)`

Answer

B