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### Discussion :: Engineering Mechanics

1. The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, Î± = Angle of projection, and Î² = Inclination of the plane with the horizontal.)

2.  A. t = $$\frac {g cos\beta} { 2u sin(\alpha - \beta) }$$ B. t = $$\frac {2u sin(\alpha - \beta)} { g cos\beta }$$ C. t = $$\frac {g cos\beta} { 2u sin(\alpha + \beta) }$$ D. t = $$\frac {2u sin(\alpha + \beta)} { g cos\beta }$$