balloon going upwards with a velocity of 12 m/s is at a height of 65 m from the earths surface at any instant. Exactly at this instant a packet is dropped from it. How much time will the packet take in reaching the surface of earth? (g = 10 m/second square)

Question: balloon going upwards with a velocity of 12 m/s is at a height of 65 m from the earths surface at any instant. Exactly at this instant a packet is dropped from it. How much time will the packet take in reaching the surface of earth? (g = 10 m/second square)

1.7.5s

2.10s

3.5s

4.None of these


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