I am planning an 800 mile trip. I am going to be driving a large pickup truck that gets about 13 MPG. With an average cost of 3.00 per gallon, how much can I expect to pay in gas?Also what would the difference be if I drove a car that got 20 MPG?
2006-06-20 18:14:12 · 15 answers · asked by stephmcu 3 in Science & Mathematics ➔ Mathematics
So a cool trick to solve problems like these is to cancel units. You want to find out how many gallons it will take during you 800 mile trip so 800miles/13(miles/gallon) = gallons needed during the trip (61). the miles from each term canceled each other leaving only gallons. so it will take ~61 gallons at a cost of 3dollars/gallons=183dollars. Again you can see that the gallons units cancellec. If you can't see it they divided each other out. It is really helpful for these kind of things when you want to make sure your getting tht right awnser. At 20mpg it will cost $120
2006-06-20 18:21:37 · answer #1 · answered by Chemist 2 · 2⤊ 0⤋
It would cost you $184.62 to drive 800 miles, using the pickup truck (800 miles divided by 13 mpg times $3.00/gallon). It would cost you $120.00 to drive 800 miles using the car (800 miles divided by 20 mpg times $3.00). If the 800 miles is one-way, then double the amount for a round trip.
2006-06-21 01:21:16 · answer #2 · answered by Susan 5 · 0⤊ 0⤋
Yes, just divide the trip length (800 miles) by the MPG and this will give the number of gallons required:
800/13 = 61.54 gallons
multiply this by the cost per gallon to get your expected cost.
61.54 x $300 = $184.6 or about $185
If you get 20 MPG instead of 13 then just reduce this value proportionally:
$185 x 13/20 = $120
2006-06-21 01:28:13 · answer #3 · answered by Jimbo 5 · 0⤊ 0⤋
for 13 mpg, it's $184.62 and for 20 mpg, it's $120. I'd go with a car that gets at least 30 mpg, because you'd only have to pay $80.
2006-06-21 01:21:15 · answer #4 · answered by violet46 3 · 0⤊ 0⤋
At 20 mpg cost is $120
At 13 mpg cost is $185
2006-06-21 01:20:23 · answer #5 · answered by themainsail 5 · 0⤊ 0⤋
the cost is $184.62 at 13 MPG for 800 miles. and $120.00 for 20 MPG
2006-06-21 01:21:51 · answer #6 · answered by Dan S 6 · 0⤊ 0⤋
800 divided by 13 = 61.538461 round to 62
62 times 3.00 = $186
800 divided by 20 = 40
40 times 3.00 = $120
2006-06-21 01:23:21 · answer #7 · answered by Angie R 4 · 0⤊ 0⤋
it would be about 184.5$ for 13 mpg, and 120$ for 20 mpg
2006-06-21 01:21:00 · answer #8 · answered by cooly619 2 · 0⤊ 0⤋
61.53 Gallons = $185 (800/13MPG)
40 Gallons = $120 (800/20MPG)
Difference of $65
2006-06-21 01:20:19 · answer #9 · answered by James H 3 · 0⤊ 0⤋
(800 miles) /(13miles/gal)* 3/gal = 184.62 cost of gas
if you use a car that got 20MPG, cost of gas is about 120 so you would spend 64.62 more if you use the pickup truck
2006-06-21 01:22:32 · answer #10 · answered by meow 3 · 0⤊ 0⤋