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