A ladder 5 metres in length is resting against vertical wall. The bottom of the ladder is pulled along the ground away from the wall at the rate of 1.5 m/sec. When the foot of ladder is 4.0 metres away from the wall , the rate of decrease of the height on the wall is: *
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8/3 ms-¹
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Answer: the rate of decrease of the height on the wall is 2m/sec
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