প্রশ্ন সংশোধন করুন
প্রশ্ন:
Annie can complete a term paper in 15 days while Bob can finish it in 20 days. What is the fraction of work left if both Annie & Bob work together for 4 days?
Annie can complete a term paper in 15 days while Bob can finish it in 20 days. What is the fraction of work left if both Annie & Bob work together for 4 days?