Question

A can do a piece of work in 8hrs and B can do it in
10hrs. If they worked together for 2hrs, then what
fraction of work will be left

Answer 1

Answer:

18/40

Step-by-step explanation:

work done by A in 1 hour = 1/8

work done by B in 1 hour = 1/10

work done by A and B together in 1 hour =1/8 +1/10= 9/40

therefore work done in 2 hours =9/40×2 =18/40