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A ball A is projected with speed $50 m s^{- 1}$ at an angle $37^{0}$ with horizontal. At the same time, a second ball B is projected in a direction shown in the figure with speed $60 m s^{- 1}$ from a point 91m from A. Both the balls collide in air. (Given, $\sqrt{3} = 1.7$ )

The time when collision takes place is

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1 s

2 s

$\sqrt{3}$ s

4 s

answer is A.

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