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Question

Shots are fired simultaneously from the top and the bottom of a vertical cliff with elevation 37 and 53 respectively as shown. If they strike the ground simultaneously, then the relation between u1 and u2 is

A
3u1=4u2
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B
4u1=3u2
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C
u1=u2
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D
u1=u22
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Solution

The correct option is B 4u1=3u2

As they strike at the some time and horizontal distance is same for both,
u1 cos 37 =u2 cos 53
u145=u235
4u1=3u2

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