Question

A can do half as much work as b in one day. B alone can do a certain work in 12 days. In how many days can a and b together finish that work?

Answer 1

Step-by-step explanation:

• if b can do a certain work in 12 days

so,b can do 1 in one day

12

2nd condition

• 1/2 of 1/12 is 1/24

so 1/12 +1/24 is 1/8

therefore they can do a certain work in 8 days