Question

A man can complete a job in 12 days and his wife can complete the same in 15 days. How long will they take to complete the job if they work together? A)6 2/3 days b)6 days c)10 days d)10 2/3 days

Answer 1

Answer:

27 days both can work ......

Answer 2

Answer:

6 2/3 days

Step-by-step explanation:

total work = L.C.M(12,15) = 60 units

man = 60/12 = 5 units/day

wife = 60/15 = 4 units/ day

together = 5+4 = 9units/day

together can finish the job in

= 60/9 = 6 2/3 days

option (a) is correct