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. `(3sqrt(6)u^2)/(8g)`
B. `(3sqrt(3)u^2)/(8g)`
C. `(u^2)/(8g)`
D. `(sqrt(3)u^2)/(g)`

Answer

B