প্রশ্ন সংশোধন করুন
প্রশ্ন:
Bill and Ben can clean the garage. together in 6 hours. If it takes Bill 10 hours working alone, how long will it take Ben working alone?
Bill and Ben can clean the garage. together in 6 hours. If it takes Bill 10 hours working alone, how long will it take Ben working alone?