Two pipes can fill a cistern in 10hr and 12 hr respectively, while the third pipe can empty it in 20hr. If all pipes are opened simultaneously, then the cistern will be filled in
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take L. C. M of
(10,12,20)= 60
efficiency of pipe a=60/10=6
similarly b=5, c=3
Now adding and subtracting (filling and emptying pipe)
(6+5)-3=8
Now divide lcm with 8
60/8=7.5
ans is 7.5 hrs
Pls mark it as brainiest
(10,12,20)= 60
efficiency of pipe a=60/10=6
similarly b=5, c=3
Now adding and subtracting (filling and emptying pipe)
(6+5)-3=8
Now divide lcm with 8
60/8=7.5
ans is 7.5 hrs
Pls mark it as brainiest
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