960÷(3+5)
=960÷8
=120天
一条隧道长960米.甲乙两施工队从两边同时开挖,甲队每天挖3米.乙队每天挖5米,多少天完成?
一条隧道长960米.甲乙两施工队从两边同时开挖,甲队每天挖3米.乙队每天挖5米,多少天完成?
数学人气:488 ℃时间:2019-10-18 08:08:29
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