প্রশ্ন সংশোধন করুন
প্রশ্ন:
Pipe A can fill up a tank in 40 minutes and pipe b can fill up the same tank in 30 minutes, how many inutes will it take for the pipes together to fill up the tank?
Pipe A can fill up a tank in 40 minutes and pipe b can fill up the same tank in 30 minutes, how many inutes will it take for the pipes together to fill up the tank?