问题 问答题

Rectangular region PQRS shown above is partitioned into ten identical smaller rectangular regions, each of which has width x. What is the perimeter of PQRS in terms Of x ?

答案

参考答案:

2×(5x+10x)=30x

解析:

根据图形可知,大长方形的宽等于小长方形的长为5x,大长方形长等于小方形的长的两倍,即为10x,所以PQRS的周长为:

2×(5x+10x)=30x

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