ab2地ab2地相距四百二十千米甲车从a地出发开往b地每小时行驶七十二千米...
发布网友
发布时间:2024-03-24 16:17
我来回答
共1个回答
热心网友
时间:2024-03-26 09:32
420km-100km=320km
(25min/60min)*72km/h=30km
320km-30km=290km
290km/(72km/h+28km/h)=2.9h
2.9h+25min=199/60h
或420km+100km=520km
(25min/60min)*72km/h=30km
520km-30km=490km
490km/(72km/h+28km/h)=4.9h
4.9h+25min=319/60h