Tough and Tricky questions: Work/Rate Problems.
If it takes 70 workers 3 hours to disassemble the exhibition rides at a small amusement park, how many hours would it take 20 workers to do this same job?  Choices.
A) 40/3	B) 10.5	C) 7	D) 7/3	E) 9/7
70 Workers = 3 hours then,   1 Worker = 3*70 Hours   20 Workers = (3*70) /(20)= 
<gadget id="calculator">(3*70) /(20)</gadget>
<output>21/2 = around 10.5</output>
10.5 Answer. 10.5
<result>B</result>
Tough and Tricky questions: Work/Rate Problems.
If it takes 70 workers 3 hours to disassemble the exhibition rides at a small amusement park, how many hours would it take 20 workers to do this same job?