[問題]考古題 Form19 sec3 PS-Q12

[凱薩琳]

Bill's car average 15 miles to a gallon of gasoline. He can drive the 24-mile round trip to and from work and pay a toll of $0.40 each way, or he can take mass transit at $1.40 each way. If only the cost of gacoline and tolls is considered, at what price per gallon of gasoline is the cost of driving equal to the cost of taking mass transit.

(A)$0.80
(B)$1.12
(C)$1.25
(D)$1.40
(E)$1.80

Ans:C

[StanleyHuang]

來回 24 mile => 所以一趟 12 mile => 一趟要用掉 12/15 加侖汽油

開車一趟的花費 = (12/15) * P + 0.4 = 坐公車的花費 = 1.4
所以 P = $1.25

[凱薩琳]

感謝感謝