SOLUTION: A person spends $160 each month on gas. His current car is able to travel 30 miles per gallon of gas. He decides to switch his current car for a new car that is able to travel 40 m

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Question 1121011: A person spends $160 each month on gas. His current car is able to travel 30 miles per gallon of gas. He decides to switch his current car for a new car that is able to travel 40 miles per gallon of gas. Assuming he price of gas stays the same, how much will he spend on gas each month with the new car?
Found 3 solutions by greenestamps, josgarithmetic, addingup:
Answer by greenestamps(13198) About Me  (Show Source):
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The new car goes 4/3 as far per gallon of gas.

Assuming the price of gas does not change AND the number of miles he drives in a month does not change, the cost of gas for the month will be 3/4 as much.

3/4 of $160 is $120.

Answer: $120 a month for gas with the new car

Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
30%28miles%2Fgallon%29%2Av%2Agallons=d%2Amiles=40%28miles%2Fgallon%29%2Au%2Agallons

30v=40u
40%2F30=v%2Fu
4%2F3=v%2Fu
u%2Fv=3%2F4

Amount to spend, gasoline for the new car:
%283%2F4%29%28160%29

highlight%28120%29dollars

Answer by addingup(3677) About Me  (Show Source):
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(30*160)/40 = 120