ÌâÄ¿ÄÚÈÝ
ÈçͼÊÇijÈ˳Ë×ø³ö×â³µºó»ñµÃµÄ³µ·Ñ·¢Æ±£¬¼Ç¼ÁËһЩÊý¾Ý£¬ÊÔ¸ù¾ÝÆäÖеÄÓйØÊý¾Ý»Ø´ðÏÂÁÐÎÊÌ⣺£¨1£©´Ó³Ë¿ÍÉϳµµ½Ï³µÆû³µµÄÐÐʻʱ¼äÊÇ min£»£¨2£©³ö×â³µÐÐÊ»µÄƽ¾ùËÙ¶ÈÊÇ km/h£»
£¨3£©ÓÉÓÚÊܵ½ÓêÁÜ£¬½ð¶îÒ»ÏîÒÑÎÞ·¨¿´Ç壬СÃ÷ÔÚ³ö×â³µ
µÄ³µÃÅÉÏ¿´µ½ÁËÈçÏÂÐÅÏ¢£º
£¨3kmÄÚΪÆð²½¼Û£¬³¬³ö3km²¿·ÖµÄÀï³Ì°´2.40Ôª/kmÁíÊÕ·Ñ£©¸ù¾ÝÉÏÊöÐÅÏ¢£¬·¢Æ±µÄ½ð¶îÓ¦¸ÃΪ Ôª£®
¡¾´ð°¸¡¿·ÖÎö£º£¨1£©ÉϳµÊ±¼äºÍϳµÊ±¼ä£¬¶þÕßÖ®²î¼ÈÊÇÆû³µÐÐʻʱ¼ä£»
£¨2£©ÒÑ֪·³Ì8kmºÍʱ¼ä£¬ÀûÓÃËٶȹ«Ê½¼ÆËã¼´¿É£»
£¨3£©´ÓÀï³ÌÀï¿Û³ý3km£¬ÆäÓàµÄ°´¼Æ·Ñ±ê×¼¼ÆËãÈ»ºó¶þÕßÏà¼Ó¼´¿É£®
½â´ð£º½â£º£¨1£©Æû³µµÄÐÐʻʱ¼ä£º
t=13£º55-13£º40=15min£»
£¨2£©³ö×â³µÐÐÊ»µÄƽ¾ùËÙ¶È£º
v=
=
=32km/h£»
£¨3£©¸ù¾Ý¼Æ·Ñ±ê×¼¿É·Ö¶Î¼Æ·Ñ£¬
0¡«3km£¬7.00Ôª£»
3km¡«8km¹²¼Æ·Ñ5km£¬Ã¿km2.4Ôª£¬¹²ÓÐ5km×2.4Ôª/km=12Ôª
¹²¼Æ³µ·ÑΪ7.00Ôª+12Ôª=19Ôª
´ð£º£¨1£©´Ó³Ë¿ÍÉϳµµ½Ï³µÆû³µµÄÐÐʻʱ¼äÊÇ15min£»
£¨2£©³ö×â³µÐÐÊ»µÄƽ¾ùËÙ¶ÈÊÇ32km/h£»
£¨3£©·¢Æ±½ð¶îӦΪ19Ôª£®
µãÆÀ£º±¾Ì⿼²éÁËÇó³ö×â³µµÄÐÐÊ»µÄʱ¼ä¡¢ËٶȺͳµ·ÑµÄ¼ÆË㣬ÊìÁ·ÕÆÎÕ²¢Áé»îÓ¦ÓÃËٶȹ«Ê½ÊǽâÌâµÄ¹Ø¼ü£»½âÌâʱ²»ÒªÊܳµÃÅÉÏ¿´µ½ÐÅÏ¢µÄÓ°Ï죬»¹Òª×¢ÒⵥλµÄ»»Ë㣮
£¨2£©ÒÑ֪·³Ì8kmºÍʱ¼ä£¬ÀûÓÃËٶȹ«Ê½¼ÆËã¼´¿É£»
£¨3£©´ÓÀï³ÌÀï¿Û³ý3km£¬ÆäÓàµÄ°´¼Æ·Ñ±ê×¼¼ÆËãÈ»ºó¶þÕßÏà¼Ó¼´¿É£®
½â´ð£º½â£º£¨1£©Æû³µµÄÐÐʻʱ¼ä£º
t=13£º55-13£º40=15min£»
£¨2£©³ö×â³µÐÐÊ»µÄƽ¾ùËÙ¶È£º
v=
£¨3£©¸ù¾Ý¼Æ·Ñ±ê×¼¿É·Ö¶Î¼Æ·Ñ£¬
0¡«3km£¬7.00Ôª£»
3km¡«8km¹²¼Æ·Ñ5km£¬Ã¿km2.4Ôª£¬¹²ÓÐ5km×2.4Ôª/km=12Ôª
¹²¼Æ³µ·ÑΪ7.00Ôª+12Ôª=19Ôª
´ð£º£¨1£©´Ó³Ë¿ÍÉϳµµ½Ï³µÆû³µµÄÐÐʻʱ¼äÊÇ15min£»
£¨2£©³ö×â³µÐÐÊ»µÄƽ¾ùËÙ¶ÈÊÇ32km/h£»
£¨3£©·¢Æ±½ð¶îӦΪ19Ôª£®
µãÆÀ£º±¾Ì⿼²éÁËÇó³ö×â³µµÄÐÐÊ»µÄʱ¼ä¡¢ËٶȺͳµ·ÑµÄ¼ÆË㣬ÊìÁ·ÕÆÎÕ²¢Áé»îÓ¦ÓÃËٶȹ«Ê½ÊǽâÌâµÄ¹Ø¼ü£»½âÌâʱ²»ÒªÊܳµÃÅÉÏ¿´µ½ÐÅÏ¢µÄÓ°Ï죬»¹Òª×¢ÒⵥλµÄ»»Ë㣮
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿