Solution for 最短距离？（图）
<br /="/"/><div></div><div></div><div><span style="display:none;">www.ddhw.com</span></div><div>Xiangdang gave correct value, but used a wrong graph in his explanation, which was corrected by LiLi (should be 40.17 cm).</div><div> </div><div>Top one of the following graphs should be able to explain the correct answer of this question, and the central one should result in LiLi's answer, and the bottom one is the intuition.</div><div>(The point of this question is at that intuition of a distance in "curved" space may fool you)<span style="display:none;">www.ddhw.com</span></div><div><br /="/"/><input /="/" onclickx="return false;" src="http://upload.ddhw.cn/image/2009/03/06/50920.gif" style="CURSOR:default" type="image"/><br /="/"/></div><br /="/"/><br /="/"/> <br /="/"/><br /="/"/> <p><br /="/"/><br /="/"/> </p><p><div align="right"><font color="#ff0000" style="BACKGROUND-COLOR: #c4dfff"> 本贴由[<b>salmonfish</b>]最后编辑于：2009-3-6 20:35:16 </font></div><span style="display:none;">www.ddhw.com</span><br /="/"/><br /="/"/> </p><p><div align="right"><font color="#ff0000" style="BACKGROUND-COLOR: #c4dfff"> 本贴由[<b>salmonfish</b>]最后编辑于：2009-3-6 23:39:46 </font></div><div style="MARGIN-TOP:20px;MARGIN-LEFT:0;MARGIN-BOTTOM:0;float:left"></div></p>sorry, Lili got the correct answer (40 cm)
<br /="/"/> sorry, Lili got the correct answer (40 cm)<br /="/"/><br /="/"/><br /="/"/><br /="/"/><br /="/"/><div style="MARGIN-TOP:20px;MARGIN-LEFT:0;MARGIN-BOTTOM:0;float:left"></div>回复：sorry, Lili got the correct answer (40 cm)
<table cellpadding="8" height="100%" width="100%"><tr><td valign="top"><br /="/"/><div>原题出得不太好。若用长方体取代盒子，就不会有歧义。</div><span style="display:none;">www.ddhw.com</span><br /="/"/><br /="/"/> <div style="MARGIN-TOP:20px;MARGIN-LEFT:0;MARGIN-BOTTOM:0;float:left"></div></td></tr></table>
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