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Mathematics, 06.12.2019 04:31 AnastaziaOpfer3822
Pumps a, b and c operate at their respective constant rates. pumps a and b, simultaneously, can fill a certain tank in 6/5 hours. pump a and c, operating simultaneously, can fill the tank in 3/2 hours; abd pumps b and c, operating simultaneously, can fill the tank in 2 hours. how many hours does it take pumps a, b, and c, operating simultaneously, to fill the tank? (a) 1/3(b) 1/2(c) 2/3(d) 5/6(e) 1
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