Question

一名司机开车 $2$ 小时，速度为每小时 $60$ 英里，在此期间汽车每加仑汽油可行驶 $30$ 英里。她每行驶一英里获得 $\$0.50$ 报酬，唯一开销是每加仑价格为 $\$2.00$ 的汽油。扣除汽油费用后，她每小时的净报酬是多少美元？

A driver travels for $2$ hours at $60$ miles per hour, during which her car gets $30$ miles per gallon of gasoline. She is paid $\$0.50$ per mile, and her only expense is gasoline at $\$2.00$ per gallon. What is her net rate of pay, in dollars per hour, after this expense?

$20$

$22$

$24$

$25$

$26$

答案：E

知识点：速率钱币

难度评级：900

视频讲解：

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文字解答：

她行驶 $2\cdot60=120$ 英里，所以收入为 $120\cdot \$0.50=\$60$ 。这次行程用汽油 $120/30=4$ 加仑，花费 $4\cdot\$2=\$8$ 。净收入为 $60-8=52$ 美元，用时 $2$ 小时，所以每小时净报酬为 $26$ 美元。正确答案是 E。

The driver travels $2\cdot60=120$ miles, so she is paid $120\cdot \$0.50=\$60$ . The trip uses $120/30=4$ gallons of gasoline, costing $4\cdot\$2=\$8$ . Her net pay is $60-8=52$ dollars over $2$ hours, or $26$ dollars per hour. Thus, E is the correct answer.

2020 AMC 10A 第 4 题

答案：E

难度评级：900

视频讲解：

文字解答：

其他年份的第 4 题