Gasoline

[naveenhv]

At a speed of 50 miles per hour, a certain car uses 1 gallon of gasoline every 30 miles. If the car starts with a full 12 gallon tank of gasoline and travels for 5 hours at 50 miles per hour, the amount of gasoline used would be what fraction of a full tank?

a) 3/25
b) 11/36
c) 7/12
d) 2/3
e) 25/36

[smohit04]

E) 25/36

Total miles - 50* 5 = 250 miles
total gallons used- 250/30 = 25/3

fraction of gasoline used - 25/(3*12) = 25/36

[RonPurewal]

per the forum rules, please search the forum before you post!
you posted 10 different threads without searching today; if you continue to do so, we'll just delete them.

look here:
at-a-speed-of-50-miles-per-hour-t11911.html