The amount of time that three secretaries worked on a special project are in the ratio of 1 to 2 to 5. If they worked a combined total of 112 hours, how many hours did the secretary, who worked the longest spend on the project?

A 80
B 70
C 56
D 16

Correct Answer: 70

Sum of ratio = 1+2+5 = 8So, the hours done by longest spend on the project = (112*5)/8                                                                                                 = 70 (Ans)
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