The width and the length of a rectangular piece of plywood are 4 feet and 8 feet, respectively. Along one edge of the plywood, a strip x inches wide and 8 feet longis removed. Then, along an edge perpendicular to the 8-foot edge, a strip x inches wide is removed. For what value of x will the remaining rectangular piece have width and length in the ratio of 2 to 5? ( 1 foot = 12 inches)
我知道這題要求的是
可以讓寬度/長度會等於2/5的x值，
但是卡在這句
Then, along an edge perpendicular to the 8-foot edge, a strip x inches wide is removed.
我的解讀是:
在垂直於另一個8-foot的邊上，再移除x inches
這樣不就代表
再把另一個4 feet的寬(垂直於8-foot）
移除掉x inches嗎？
式子寫成
4-x /8 =2/5 求得x=9.6
但答案是16
是用 4-x/8-x = 2/5 求得的
不太懂為什麼要把8減掉x
不是應該要用垂直於8-foot 的邊（4feet) 去減x嗎？
描述的有點複雜，還煩請版上的大大
幫小弟我解答一下，看是我哪裡理解錯了
感謝再感謝！