A balloon is moving up from the ground in such a way that its acceleration is linearly decreasing with its height above the ground. It starts from the ground with acceleration 4 ml 52 and with zero initial velocity. Its acceleration becomes zero at a height 3 m. The speed of the balloon at a height 1.5 m is (A) 4 m/s (B) 8 m/s (C) 6 m/s (D) 3 m/s
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Answer:
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