A salesperson purchased an automobile that was advertised as averaging 27 mi/gal in the city and 38 mi/gal on the highway. A recent sales trip that covered 1706 miles required 53 gallons of gasoline. Assuming that the advertised mileage estimates were correct, how many miles were driven in the city?
Ans:
Let x miles be driven in the city.
Then miles driven in highway = 1706 - x
Gasolene required for city driving = x/27
Gasolene required for highway = (1706 - x)/38
Total gasoline =
Multiplying by LCM of 27 and 38 which is 1026, to eliminate the denominator
Simplifying and grouping like terms
So miles driven in city = 756
Miles driven in highway = 1706 - 756 = 950
Hope you got it :)