英语听力论坛 » English Corner » 2011.2.19寒假“英语脑筋急转弯”36

xiaomeixin 发表于 2011-2-19 10:45

2011.2.19寒假“英语脑筋急转弯”36

[color=#000000]A 10 foot rope ladder hangs over the side of a boat with the bottom rung on the surface of the water. There is one foot between rungs and the tide goes  at the rate of 6 inches per hour. How long until three rungs are covered?[/color]
[color=#000000][/color]
[color=#000000][/color]
**** Hidden Message *****

xudongdong117 发表于 2011-2-19 13:21

Please kindly help give me the answer, I can't think it out, really apriciate your help!

yy2235 发表于 2011-2-19 21:26

[i=s] 本帖最后由 xiaomeixin 于 2011-2-21 14:00 编辑 [/i]

**** Hidden Message *****.

查看完整版本: 2011.2.19寒假“英语脑筋急转弯”36