Question

A cistern has two supply pipes A,B and a waste pipe C. Through A and B, the cistern can be filled in 15 minutes and 18 minutes respectively. Through C the full cistern can be emptied in 20 minutes. At first the pipes A and C are opened for 5 minutes. Then the pipe A is closed and the pipe B is opened. How much time is needed to fill the cistern?????
plz solve this if you can plz don't spam
plz plz plz ​

Answer 1

Answer:

I HOPE IT HELPFUL ANSWER.

Step-by-step explanation:

【◆°_°◆】