1/(1/15+1/10)=6(小时)
谢!
从A城到B城甲汽车需15小时,从B城到A城乙汽车需10小时,两车同时从两地相对开出,经过几小时相遇?
从A城到B城甲汽车需15小时,从B城到A城乙汽车需10小时,两车同时从两地相对开出,经过几小时相遇?
数学人气:992 ℃时间:2019-12-12 10:30:04
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