A photograph mearsuring 5'' wide*7'' long must be reduced in size to fit a space 4 inches long in an advertising brchure
问题描述：
A photograph mearsuring 5'' wide*7'' long must be reduced in size to fit a space 4 inches long in an advertising brchure.How wide must the space be so that the picture remains in proportion?
答
要把大照片等比例变小塞到广告的册子里
长是7:4
宽也必须是7:4
所以答案是5/7*4=20/7