A tap can fill an empty tank in12 hours and another tap carnempty half the tank in 10 hoursIt both the taps are opened simultaneously, how long would ittake for the empty tank to befilled to half its capacity? 1(1J 30 hours (2)20 hours(3) 15 hours (4) 12 hours

A tap can fill an empty tank in12 hours and another tap carnempty half

1.	A tap can fill an empty tank in12 hours and another tap carnempty half the tank in 10 hoursIt both the taps are opened simultaneously, how long would ittake for the empty tank to befilled to half its capacity? 1(1J 30 hours (2)20 hours(3) 15 hours (4) 12 hours
Answer» Answer: 3)15 hoursExplanation:if emptying pipe empty half the tank in 10 hours then emptying pipe fill the tank in 10*2=20 hoursTotal capacity=60A fills in 12 hours thus efficiency=5B empty in 20 hours thus efficiency =-3(A-B) efficiency=5-3=2 units/hr= (1/2 of TC)/2 units=30/2=15 hrs