There are 12 pipes that are connected to a tank. Some of them are fill pipes and the others are drain pipes. Each of the fill pipes can fill the tank in 8 hours and each of the drain pipes can drain the tank completely in 6 hours. If all the fill pipes and the drain pipes are kept open, an empty tank gets filled in 24 hours. How many of the 12 pipes are fill pipes?

There are 12 pipes that are connected to a tank. Some of them are fi

1.	There are 12 pipes that are connected to a tank. Some of them are fill pipes and the others are drain pipes. Each of the fill pipes can fill the tank in 8 hours and each of the drain pipes can drain the tank completely in 6 hours. If all the fill pipes and the drain pipes are kept open, an empty tank gets filled in 24 hours. How many of the 12 pipes are fill pipes?
Answer» IPES are FILL pipesso(x/8)-((12-x)/6)=1/24on SOLVING x=7 ANS