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

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 :

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
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