প্রশ্ন সংশোধন করুন
প্রশ্ন:
In still water a boy rows 5 miles an hour. With the aid of current he can make a 21 miles trip in 3 hours. How fast is the current?
In still water a boy rows 5 miles an hour. With the aid of current he can make a 21 miles trip in 3 hours. How fast is the current?