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A boy playing on the roof of 10 m high building throws a ball with a speed of `10 m s^-1`at an angle of `30^@` with the horizontal. How far from the throwing point will the ball be at the height of 10 m from the ground? `(g=10 m s^-2, sin 30^@ = 1/2, cos 30^@= sqrt3/2)`

A

2.60 m

B

4.33 m

C

5.20 m

D

8.66 m

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TARGET PUBLICATION-Motion in a plane-Exercise
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