প্রশ্ন সংশোধন করুন
প্রশ্ন:
A and B together can paint a wall in 3 days . A can do it alone in 5 days . How many days would it take B to do this job alone ?
A and B together can paint a wall in 3 days . A can do it alone in 5 days . How many days would it take B to do this job alone ?