Question

A and B can paint a wall in 3 days A can do it alone in 5 days .how many would it take B to do the job alone

Answer 1

Answer:

15/2 days

Step-by-step explanation:

time taken A and B to paint wall=3days

work to do A and B 1day=1/3part

time taken to A alone to Paint wall=5days

work to do A in 1 day=1/5part

work to do B alone 1day=1/3-1/5=2/15

time taken B to do the job alone=1divide2/15=15/2days