A cistern has two inlets A and B which can fill it in 12 minutes and 15 minutes respectively. An outlet C can empty the full cistern in 10 minutes. If all the three pipes are opened together in the empty tank ,how much time will they take to fill the tank completely?
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A +B- C= 5+4-( 60/10)6=3 units . required time
= 60 /3=20.
= 60 /3=20.
AbhijeetTiwari1:
can you explain it?
take the L.C.M of 12,15 which is 60. then proceed according to the question.
ok, thanks again
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A cistern has 2 inlets a and b which can fill it in 12 minutes and 15 minutes respectively. An outlet can empty the filled cistern in 10 minutes. If all the 3 pipes are opened together in the empty cistern. How much time will it take to fill the tank completely?
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