A certain taxi company charges $3.10 for the first~$\frac{1}{5}$~of a mile plus $0.40 for each additional ~$\frac{1}{5}$~ of a mile. What would this company charge for a taxi ride that was 8 miles long?


$15.60

$16.00

$17.50

$18.70

$19.10

考题讲解

8mile=40*(1/5)mile 所以按照题目表述,第一个1/5收费3.10,剩下每增加一个1/5收费0.40,总费用应该为:
3.10+0.40*39=18.70。正确选项为D。

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