A tank has eight pipes, some of which fill the tank and the rest empty the tank. Each inlet pipe fills the tank in 8 hours while each outlet pipe empties it in 6 hours. If all the pipes are kept open…

Question

A tank has eight pipes, some of which fill the tank and the rest empty the tank. Each inlet pipe fills the tank in 8 hours while each outlet pipe empties it in 6 hours. If all the pipes are kept open when the tank is full, it takes 6 hours to drain the tank. How many pipes are inlet pipes?

PYQPulse · Accepted Answer

Four

A tank has eight pipes, some of which fill the tank and the rest empty the tank. Each inlet pipe fills the tank in 8 hours while each outlet pipe empties it in 6 hours. If all the pipes are kept open when the tank is full, it takes 6 hours to drain the tank. How many pipes are inlet pipes?

Answer: C. Four