Question

29.A balloon is moving vertically with a velocity of 4 metre per second .when it is at a height of h,a body is gently release from it.if it reaches the ground in 4 seconds ,the height of the balloon when the body is released is A)62.4m B)42.4m C)78.4 D)89.2 In above problem what is the height of balloon when the body strikes the ground ?

Answer 1