[計量] 請教兩題計量
看板GRE (GRE入學考試)作者yecochi (可恨有機 禁止裝死遊戲)時間15年前 (2010/10/10 21:12)推噓0(0推 0噓 0→)留言0則, 0人參與討論串18/21 (看更多)
請教兩題計量from OG
GR92-2 sec2
14. A 20-foot ladder leaning against a vertical wall with the
base of the ladder 10 feet from the wall is pulled 2 feet farther out from
the wall, causing the top of the ladder to drop x feet.
col.A x
col.B 2
ans:B
不知道要怎麼算
28.
A window received 1/3 of her husband's estate, and each of her three sons
received 1/3 of the balance. If the window and one of her sons received a
total of $60000 from the estate, what was the amount of the estate?
A. $90,000
B. $96,000
C. $108,000
D. $135,000
E. $180,000
ans:C
題目看不太懂說
有請高手賜教了，謝謝!!!
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