跑得快的马每天行240里,跑得慢的马每天行150里,慢马先行12天,快马几天可追上慢马?
人气:137 ℃ 时间:2020-01-29 10:11:30
解答
150×12÷(240-150)
=1800÷90,
=20(天).
答:快马20天可追上慢马.
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