প্রশ্ন সংশোধন করুন
প্রশ্ন:
A cistern is normally filled with eater in 10 hours but takes 5 hours longer to fill because of a leak in its bottom . If the cistern is full, the leak will empty the cistern in -
A cistern is normally filled with eater in 10 hours but takes 5 hours longer to fill because of a leak in its bottom . If the cistern is full, the leak will empty the cistern in -