Question

There is a leak in the bottom of a cistern. When the cistern had no leak, it was filled in
2.5 hours. It now takes half an hour longer. If the cistern is full of water, then how long
would it take to empty itself if water starts leaking out at double the usual rate once
the cistern is half empty
е​

Answer 1

Step-by-step explanation:

when repairing , its completed in 9/2 hrs

when leak nullified take half hrs less so in 4 hrs

1/4-2/9=1/36

hence it would take 36 hr