The amounts 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 120 hours, how many hours did the secretary who worked the longest spend on the project?
Choices:  A) 80  B) 70  C) 75  D) 16  E) 14
8x = 120   =&gt; x = 15   Therefore the secretary who worked the longest spent 15 x 5 = 75 hours on the project   Option (75)
<result>C</result>
The amounts 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 120 hours, how many hours did the secretary who worked the longest spend on the project?