A tank has two inlet taps A and B which can fill it in 12 hours and 15 hours respectively. An outlet C, can empty the full tank in 10 hours. If all the three taps A,B and C are opened together, how much time will they take to fill the empty tank?
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Answer:
20 hours
Step-by-step explanation:
1/12+1/15-1/10
= (5+4-6)/60
= 3/60
= 1/20
20Hours
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