One hundred gallons of fuel are purchased at $0.70 per gallon. The fuel is consumed at a rate of $0.50 worth of fuel per hour. At this rate, how many hours are required to consume the 100 gallons of fuel?
Pick one:
A) 100	B) 120	C) 140	D) 160	E) 180
The fuel is consumed at this rate: $0.50/$0.70 = 5/7 gallons per hour.   The time it takes to consume 100 gallons is:  100 / (5/7)= 
<gadget id="calculator"> 100 / (5/7)</gadget>
<output>140</output>
140 hours.   The answer is 140.
<result>C</result>
One hundred gallons of fuel are purchased at $0.70 per gallon. The fuel is consumed at a rate of $0.50 worth of fuel per hour. At this rate, how many hours are required to consume the 100 gallons of fuel?