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Question

An aeroplane moving horizontally with a speed of 720 km/h drops a food packet, while flying at a height of 396.9 m. The time taken by a food packet to reach the ground and its horizontal range is (Take g=9.8 m/sec2)

A
3 sec and 2000 m
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B
5 sec and 500 m
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C
8 sec and 1500 m
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D
9 sec and 1800 m
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Solution

The correct option is D 9 sec and 1800 m

Time of descent t=2hg=2×396.99.8t=9 secand horizontal distance S=u×tS=(720×518)×9=1800 m


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