A tap can fill the tank in 15 minutes and another can empty it in 8 minutes. If the tank is already half full and both the taps are opened together, the tank will be:	Select the correct option:
A) filled in 12 min  B) emptied in 12 min  C) filled in 8 min  D) emptied in 8 min  E) emptied in 10 min
work done by both taps= 1/15+(-1/8)= -7/120 so tank will be emptied becoz of minus sign.   so time taken= 120/7   given the tank is already half filled   so another half will be emptied in 120/7*1/2   nearly 8 minutes   ANSWER:emptied in 8 min
<result>D</result>
A tap can fill the tank in 15 minutes and another can empty it in 8 minutes. If the tank is already half full and both the taps are opened together, the tank will be: