A boy playing on the roof of a 10m high building throws a ball with a speed of 10m/s at the angle of 30∘ with the horizontal. How far from the throwing point will be the ball be at the height of 10m from the ground ? (Take, g=10m/s2)
A
5.20m
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B
4.33m
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C
2.60m
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D
8.66m
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