1.

From the top of a tower 20 m high. A ball is thrown horizontally. If the line joining the point of projection to the pointwhere it hits the ground makes an angle of 45° with the horizontal, then the initial velocity of the ball is:A) 10 ms-110.B) 4 ms1C) 15 ms-1D) 3 ms-1

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wrong answer shishter



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