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?

A 0.2

B 7.5

C 5.0

D 6.4

E None of these

Solution

Correct Answer: Option B