One hundred gallons of fuel are purchased at $0.80 per gallon. The fuel is consumed at a rate of $0.20 worth of fuel per hour. At this rate, how many hours are required to consume the 100 gallons of fuel?
Options:
A) 400	B) 450	C) 500	D) 550	E) 600
The fuel is consumed at this rate: $0.20/$0.80 = 0.25 gallons per hour.   The time it takes to consume 100 gallons is: 100 / 0.25 0.20/ 0.80= 
<gadget id="calculator">0.20/ 0.80</gadget>
<output>0.25</output>
0.25 gallons per hour.   The time it takes to consume 100 gallons is:  100 / 0.25= 
<gadget id="calculator"> 100 / 0.25</gadget>
<output>400</output>
400 hours.   The answer is 400.
<result>A</result>
One hundred gallons of fuel are purchased at $0.80 per gallon. The fuel is consumed at a rate of $0.20 worth of fuel per hour. At this rate, how many hours are required to consume the 100 gallons of fuel?