two pipes a and b together can fill a tank in 20 hours. ratio of efficiency a to b is 5 : 4. they together filled the tank for the first 4 hours then b is closed and another pipe c is opened. now if tank is filled in another 9 hours then c alone can fill the tank in how many hours.
Answers
Answered by
1
Soltion to your question is:
Attachments:
Similar questions