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[Problem Solving]

试题详情

题目:

Mary passed a certain gas station on a highway while traveling west at a constant speed of 50 miles per hour. Then, 15 minutes later, Paul passed the same gas station while traveling west at a constant speed of 60 miles per hour. If both drivers maintained their speeds and both remained on the highway for at least 2 hours, how long after he passed the gas station did Paul catch up with Mary?

选项:

A、30 min
B、45 min 
C、1 hr
D、1 hr 15 min
E、1 hr 30 min

答案:

D

提问:

这个追击问题是用M和P之间的距离 12.5 除以 他们的速度差 10 吗?这样的话是1.25呀

解答:

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阅读1970
解答: sysadmin

提问:

这个追击问题是用M和P之间的距离 12.5 除以 他们的速度差 10 吗?这样的话是1.25呀

解答:

点赞0
阅读1971
解答: sysadmin老师

提问:

这种题总是算不明白

解答:

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阅读1987
解答: sysadmin老师

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