Question

A B CAN TOGETHER BUILD A WALL IN 25 DAYS .THEY WORKED TOGETHER FOR 15 DAYS THEN B GOES AWAY. A FINISHES THE REST OF THE WORK ALONE IN 20 DAYS.HOW LONG WILL EACH TAKE TO FINISH THE WORK SEPARATELY ?

Answer 1

A can work in 12 days
B can do in 13 days