Question

Two mechanics, Martin and Gordon, are working on your car. Martin can complete the work in 4 hours, while Gordon can complete the work in 2 hours. How many hours does the maintenance take if they work together? a. one half b. three fourths c. six eighths d. four thirds

Answer 1

well, you can find that out using this formula :

4 x 2 / 4+2

4 x 2 / 6

= 8/6

=4/3

So the answer is option d. four thirds

Hope this helps

Answer 2

In one hour Martin working alone can complete 1/4 of the work and in one hour Gordon working alone can complete 1/2 of the work.
Working together they can complete 1/4 + 1/2 = 3/4 of the work in one hour. Therefore it will take 4/3 hours to complete the work when they work together.
The correct answer is d. four thirds.