Question

If a person can complete a job in 8 hours and his/her friend needs 6 hours to do the same job, what portion of the job would the two of them complete by working together for two hours?

Answer 1

7/12th of the job

Explanation:

2/8 + 2/6

6/24 + 8/24

14/24

7/12

Answer 2

7/12

Explanation:

Proportion of job completed by the person in 2hours: 2x1/8 = 2/8 =1/4

proportion of job completed by friend in 2 hours: 2x1/6 = 2/6 =1/3

total proportion: 1/4 + 1/3 = 7/12