প্রশ্ন সংশোধন করুন
প্রশ্ন:
A takes thrice s long do a price of work, as B takes. A&B together can finish a price of work in 15 days. A long can do it in-
A takes thrice s long do a price of work, as B takes. A&B together can finish a price of work in 15 days. A long can do it in-