The amount of time that three people worked on a special project was in the ratio of 2 to 4 to 6. If the project took 144 hours, how many more hours did the hardest working person work than the person who worked the least?
Select the correct option.
A) 47 hours
B) 45 hours
C) 48 hours
D) 49 hours
E) 50 hours
Let the persons be A, B, C.   Hours worked:   A = 2*144/12= 
<gadget id="calculator">2*144/12</gadget>
<output>24</output>
24 hours   B= 4*144/12= 
<gadget id="calculator">4*144/12</gadget>
<output>48</output>
48 hours   C= 6*144/12= 
<gadget id="calculator">6*144/12</gadget>
<output>72</output>
72 hours   C is the hardest worker and A worked for the least number of hours. So the difference is  72-24= 
<gadget id="calculator"> 72-24</gadget>
<output>48</output>
48 hours.   Answer : 48 hours
<result>C</result>
The amount of time that three people worked on a special project was in the ratio of 2 to 4 to 6. If the project took 144 hours, how many more hours did the hardest working person work than the person who worked the least?