Engineering Mechanics
The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)

t = g cos β/2u sin (α + β)
t = 2u sin (α + β)/g cos β
t = g cos β/2u sin (α - β)
t = 2u sin (α - β)/g cos β

ANSWER DOWNLOAD EXAMIANS APP

Engineering Mechanics
The term 'Centroid' is

The same as centre of gravity
The point of suspension
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
None of the listed here

ANSWER DOWNLOAD EXAMIANS APP