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26 October, 21:32

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

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  1. 26 October, 21:36
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    Let x be the time in hours it takes for Martin and Gordon to finish the job if they work together. Within this time, Martin and Gordon do x/4 and x/2 work individually, respectively. The sum of the two works should be equal to 1.

    x/4 + x/2 = 1

    The value of x is 1 1/3. Thus, the answer is letter D. 4/3 hours.
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