A bus trip of 450 miles would have taken 1 hours less if the

lookingbank2022-10-04 11:39:542条回答

A bus trip of 450 miles would have taken 1 hours less if the average speed S for the trip had been greater by 5 miles per hour.What was the average speed S,in miles per hour,for the trip?
A、10 B、40 C、45 D、50 E、55

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我是帅僵尸 共回答了18个问题 | 采纳率100%
设speed S 为V,则(450/v)-1=450/(v+5),由此可知v=45,答案为C
1年前
小大小 共回答了16个问题 | 采纳率81.3%
还真看不懂
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