Question

In 20 min two pipe p and q working individually can fill 2/3rd and 4/5th of a tank respectively. There is an exhaust pipe at the bottom of the tank that can empty the tank in X min. All the three pipe if opened simultineoysly can fill empty tank in 18.5 min. the value of X is​

Answer 1

Answers is 44

Because 20+18=38

38+6 = 44