Question

翻译英语。

a motorist travelled at 80km/h for 120km and at 60km/h for another 90km. find his average speed for the whole journey?

Mr Lim drove at 70km/h for 1 hour 30 minutes .he then drove another 55km .if his average speed for the whole journey was 80km/h ,what was his speed for the 55km journey?
不要在百度和谷歌翻译……自己试试吧、

Answer 1

一个骑摩托车的人以80千米时速行驶了120千米，又以60千米时速行驶了90千米.
求其全程平均速度。

Lim先生以70千米时速行驶了1小时30分钟。他又行驶了55千米。如果他全程平均时速为80千米，他在那55千米中速度是多少?

Answer 2