Mathematics, 10.03.2020 01:09 lovelyheart5337
A bag of sand originally weighing 144 lb is lifted at a constant rate. As it rises, sand also leaks out at a constant rate. At the instant when the bag has been lifted to a height of 18 feet, exactly half of the original amount of sand remains. (Neglect the weight of the bag and the lifting equipment.) How much work was done lifting the sand this far?
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A bag of sand originally weighing 144 lb is lifted at a constant rate. As it rises, sand also leaks...
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