Mathematics, 30.08.2019 21:40 cathydaves
Acistern can be completely drained by a pipe in 6 hours. it can be filled by two pipes in 4 hours and 5 hours, respectively. how many hours will the empty cistern take to fill if all the pipes are running? if x is the time to fill it, which of the following equations could be used to solve for t?
a. 4x + 5x - 6x = 1
b. 15x + 12x - 10x = 60
c. 4x + 5x = 20
Answers: 1
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Acistern can be completely drained by a pipe in 6 hours. it can be filled by two pipes in 4 hours an...
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