Mathematics, 17.09.2019 05:20, 2891643
Awater tank can be emptied by using one pump for 4 hours. a second, smaller pump can empty the tank in 11 hours. if the larger pump is started at 1: 00 p. m., how much time should pass until the smaller pump is started so that the tank will be emptied at 4: 00 p. m.?
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Awater tank can be emptied by using one pump for 4 hours. a second, smaller pump can empty the tank...
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