走过3/5的路程时,Lim先生路过一辆同向行驶的货车.Lim先生2小时后到达终点,这时货车离他60KM.
已知货车平均速度为60km/h,求Lim先生行驶的总程
从遇车开始,一共经过2小时
2小时中.货车走了 2*60=120KM
Lim走了 120+60=180KM
全程为 180除以（1-3/5）= 180除以2/5 = 450KM
英语翻译After travelling 3/5 of the journey,Mr Lim passed a lorr
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