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【OG20-P152-40题】
The figure above shows a path around a triangular piece of land. Mary walked the distance of 8 miles from P to Q and then walked the distance of 6 miles from Q to R. If Ted walked directly from P to R, by what percent did the distance that Mary walked exceed the distance that Ted walked?
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题目:如图所示,一块儿直角三角形土地包含道路PQ、QR以及PR。Mary走了8英里从P走到Q,然后走了6英里从Q走到R。假设Ted直接从P走到R,那么Mary比Ted多走了百分之几?
解答:题目涉及两步骤:PR的距离;(PQ+QR-PR)/PR=?%
1. 由勾股定理得出PQ2+QR2=PR2,即PR2 =82 + 62, 求得PR=10.
2. (PQ+QR-PR)/PR=(8+6-10)/10*100%=40%
题目讨论 (2条评论)

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学习高手
mary比ted多走的距离为什么最后不是除以mary走的距离?
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0 回复 2019-03-22 14:47:27
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超级大可爱回复学习高手
因为题目问的是“ exceed the distance that Ted walked”,是和ted比就是除以Ted走的距离
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0 回复 2020-11-08 14:49:51
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拽mat
注意是exceed the distance超过了多少
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0 回复 2018-02-25 19:04:53