Question

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
Ms. Sue
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!
I know the average cost of gasoline is 35 cents per gallon is ridiculous, but just a question
Ms. Sue
I'll be glad to check your answer.
my answer is c
Ms. Sue
Right!

Can you please explain how you go this answer please? Thanks!

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