哈哈爸 2009-5-2 01:18
求助
Allen, Benedict and Carl started at the same instant from the same point using the
same route trying to overtake a fourth cyclist Donald traveling at a constant speed ahead of them. Allen and Benedict each took 10 hours and 2 hours respectively to overtake Donald.
Given that Allen, Benedict and Carl each cycled at the constant speed of 4 km/h, 5 km/h and 10 km/h respectively throughout the journey, find the time, in hours, that Carl took to overtake Donald..
greenjyz 2009-5-2 07:53
En ? are you sure the data are correct ?.
哈哈爸 2009-5-2 09:43
回复 3#pig5pig 的帖子
would u pls offer more informations of your solution? thanks..