A particle is projected vertically upwards from point A on the ground. It takes t1 time to reach a point B but it still continues to move up. If it takes further t2 time to reach the ground from point B then height of point B from the ground is :
A) 1/2*g*(t1 +t2)2
B) gt1t2
C) 1/2*g*(t1 + t2)2
D) 1/2*g*t1 t2
Xplain the solution.........