1.

A boy standing on a building of height 20 m throws a stone with a velocity of 15 ms−1. What should be the angle of projection so that the stone has a range of 30 m ?(Take g=10 m/s2)

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A boy standing on a building of height 20 m throws a stone with a velocity of 15 ms1. What should be the angle of projection so that the stone has a range of 30 m ?

(Take g=10 m/s2)



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