Question : A balloon is at a height of 81m and is ascending upwards with a velocity of 12ms −1. A body of 2 kg weight is dropped from it. If g = 10ms −2 , the body will reach the surface of the earth in
(A) 1.5 s
(B) 4.025s
(C) 5.4 s
(D) 6.75 s
Answer : option (C)
Solution :
