A person throws a ball with a velocity v from top of a building in vertically upward direction. The ball reaches the ground with a speed of 3v. The height of the building is |
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(b) |
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(c) |
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(d) |
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A person throws a ball with a velocity v from top of a building in vertically upward direction. The ball reaches the ground with a speed of 3v. The height of the building is |
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(a) |
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(b) |
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(c) |
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(d) |
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