math

A saleman operates a car which averged 15 miles to a gallon of gasoline.By installing a new carburetor the car improves its mileage by 1/5. How much will he save on gasoline during a year in which he covers 5400 miles, if the average cost of gasoline is 35 cents per gallon?

a. $15.75
b. $17.50
c. $21
D. $25.20
E. $26.25

PLEASE ANSWER AND EXPLAIN

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  1. Is this about Saudi Arabia??

    The last time the price of gas in the U.S. was $0.35 a gallon was in 1970 -- over 40 years ago.

    https://www1.eere.energy.gov/vehiclesandfuels/facts/2012_fotw741.html

    I've seen a lot of old questions, but this is absolutely ridiculous!

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    Ms. Sue
  2. I know the average cost of gasoline is 35 cents per gallon is ridiculous, but just a question

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  3. I'll be glad to check your answer.

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    Ms. Sue
  4. my answer is c

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  5. Right!

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    Ms. Sue
  6. Can you please explain how you go this answer please? Thanks!

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