At a speed of 40 miles per hour, a certain car uses 1 gallon of gasoline every 40 miles. If the car starts with a full 12 gallon tank of gasoline and travels for 5 hours at 40 miles per hour, the amount of gasoline used would be what fraction of a full tank?	Choose the correct option.
A) 3/25 B) 5/12 C) 7/12 D) 2/3 E) 25/36
Gas used = (5 hours)*(40 miles/hour)*(1 gallon/40 miles) = 5 gallons   Portion used = (5) / 12 = 5/12   Ans 5/12
<result>B</result>
At a speed of 40 miles per hour, a certain car uses 1 gallon of gasoline every 40 miles. If the car starts with a full 12 gallon tank of gasoline and travels for 5 hours at 40 miles per hour, the amount of gasoline used would be what fraction of a full tank?