KA-0159
about 135sOne tap fills a tank in 6 hours. A second tap fills the same tank in 4 hours. Both taps are opened together on an empty tank. How long does it take to fill?
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Needs an idea, not just a procedure.
3 in a row to finish this ladder.
0/1 solvedOne tap fills a tank in 6 hours. A second tap fills the same tank in 4 hours. Both taps are opened together on an empty tank. How long does it take to fill?