two inlet pipes A and B can fill an empty cistern in 2 hours and 5 hours respectively. if both are opened together in the empty cistern, how much time will they take to fill it completely?
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pipe A = 2 hours
pipe B = 5 hours
his L.C.M = 10
now find his capicity per hour
pipe A = 5
pipe B = 2
when pipes are both opened
now his capicity = 5+2 = 7
and now time = 10/7 = 1.482 hours
pipe A = 2 hours
pipe B = 5 hours
his L.C.M = 10
now find his capicity per hour
pipe A = 5
pipe B = 2
when pipes are both opened
now his capicity = 5+2 = 7
and now time = 10/7 = 1.482 hours
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