Question

12£®È«¹úÌú·´óÌáËÙ¸øÈËÃǵijöÐдøÀ´¼«´óµÄ±ãÀû£®ÔÚ¹ðÁÖ±±µ½ÄÏÄþÖ®¼äÔ¼437kmµÄÌúµÀÏßÉÏ£¬ÔËÐÐ×ÅÁ½¶Ô¡°³Ç¼Ê¿ìËÙÁгµ¡±N801/N802´ÎºÍN803/N804´Î£®ÏÂÃæÊÇN801´Î¿ìËÙÁгµµÄÔËÐÐʱ¿Ì±í£®

Õ¾Ãû	¹ðÁÖ±±	¹ðÁÖÄÏ	ÁøÖÝ	ÄÏÄþ
µ½Õ¾Ê±¼ä	ʼ·¢Õ¾	8£º17	10£º30	13£º26
·¢³µÊ±¼ä	8£º06	8£º26	10£º34	ÖÕµãÕ¾
Àï³Ì£¨ km£©	0	11	176	437

Çë¸ù¾ÝÁгµÊ±¿Ì±í»Ø´ðÏÂÁËÎÊÌ⣺
£¨1£©N801´ÎÁгµÓɹðÁÖÄϵ½ÄÏÄþµÄƽ¾ùËٶȴóСÊǶàÉÙ£¿
£¨2£©N801´ÎÁгµÓɹðÁÖ±±µ½ÄÏÄþÈ«³ÌµÄƽ¾ùËٶȴóСÊǶàÉÙ£¿

Answer 1

·ÖÎö £¨1£©ÖªµÀN801´ÎÁгµ´Ó¹ðÁÖÄϵķ¢³µÊ±¼äºÍµ½´ïÄÏÄþÕ¾µÄʱ¼äÇó³öÔËÐÐʱ¼ä£¬ÔÙÇó³ö¹ðÁÖÄϵ½ÄÏÄþµÄ·³Ì£¬¸ù¾Ýv=$\frac{s}{t}$Çó³öN801´ÎÁгµÓɹðÁÖÄϵ½ÄÏÄþµÄƽ¾ùËٶȣ»
£¨2£©ÖªµÀN801´ÎÁгµ´Ó¹ðÁÖ±±µÄ·¢³µÊ±¼äºÍµ½´ïÄÏÄþÕ¾µÄʱ¼äÇó³öÈ«³ÌÔËÐÐʱ¼ä£¬ÓÖÖªµÀ¹ðÁÖ±±µ½ÄÏÄþµÄ·³Ì£¬¸ù¾Ýv=$\frac{s}{t}$Çó³öN801´ÎÁгµÓɹðÁÖ±±µ½ÄÏÄþÈ«³ÌµÄƽ¾ùËٶȣ®

½â´ð ½â£º£¨1£©N801´ÎÁгµ´Ó¹ðÁÖÄϵķ¢³µÊ±¼äºÍµ½´ïÄÏÄþÕ¾ËùÓõÄʱ¼ä£º
t=13£º26-8£º26=5h£¬
¹ðÁÖÄϵ½ÄÏÄþµÄ·³Ì£º
s=437km-11km=426km£¬
ÔòN801´ÎÁгµÓɹðÁÖÄϵ½ÄÏÄþµÄƽ¾ùËٶȣº
v=$\frac{s}{t}$=$\frac{426km}{5h}$=85.2km/h£®
£¨2£©N801´ÎÁгµ´Ó¹ðÁÖ±±µÄ·¢³µÊ±¼äºÍµ½´ïÄÏÄþÕ¾ËùÓõÄʱ¼ä£º
t¡ä=13£º26-8£º06=5h20min=5$\frac{1}{3}$h£¬
¹ðÁÖ±±µ½ÄÏÄþµÄ·³Ìs¡ä=437km£¬
v¡ä=$\frac{s¡ä}{t¡ä}$=$\frac{437km}{5\frac{1}{3}h}$¡Ö81.9km/h£®
´ð£º£¨1£©N801´ÎÁгµÓɹðÁÖÄϵ½ÄÏÄþµÄƽ¾ùËٶȴóСÊÇ85.2km/h£»
£¨2£©N801´ÎÁгµÓɹðÁÖ±±µ½ÄÏÄþÈ«³ÌµÄƽ¾ùËٶȴóСÊÇ81.9km/h£®

µãÆÀ ´ËÌâÖ÷Òª¿¼²éµÄÊÇѧÉú¶ÔËٶȼÆË㹫ʽµÄÀí½âºÍÕÆÎÕ£¬×¢ÒâÈ«³ÌµÄƽ¾ùËÙ¶ÈÒªÓÃ×Ü·³Ì³ýÒÔ×Üʱ¼äÇó³ö£¬Í¬Ê±»¹ÒªÇóѧÉúÈÏʶÁгµÊ±¿Ì±í£®