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A boy playing on the roof of a 10 m high building throws a ball with a speed of `10 ms^-1` at an angle of `30^0` with the horizontal. How far from the throwing point will the ball be at the height of 10 m from the ground?given that `g=10 ms^-2`, `sin30^0=1/2`,`cos30^0=sqrt3/2`

A

`5.20 m`

B

`4.33 m`

C

`2.60 m`

D

`8.66 m`

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