a car travelled at a speed of 90km/h.it left town ponpon at 11.00a.m.what time will it reach town dondon which is255km a
问题描述：
a car travelled at a speed of 90km/h.it left town ponpon at 11.00a.m.what time will it reach town dondon which is255km away?
答
一辆车以每小时90千米的速度行驶.它在上午11点离开ponpon,要到达255千米外的dondon,是在什么时间?
255/90=17/6
在下午1点50分到达.