[計量] 請教一題PS
a trailor trims 4 feet from opposite edges of a square piexe of cloth,and 5 feet from the other two edges. if 120 square feet of cloth remain, what was the length of a side of the original piece of cloth?
from the other two edges. if 120 square feet of cloth remain, what was the length of a side of the original piece of cloth.
A)12
B)20
C)24
D)26
E)40
這是當初在美加的練習題
被我挖出來寫的
本以為很簡單卻想不透...
請大家一起來思考吧!
我想的圖形是一個正方形
對角線被裁縫車了4FEET
然後同一個點出發朝兩個邊縫了5FEET
不過怎麼看都不是對的XD
請數學神人幫忙解惑
謝謝^^
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