第1个回答 2013-10-27
设所需时间 = X,
甲总共铺的公式为 = (0.04)X
乙总共铺的公式为 = (0.04)*(1+1/8)X
25km = (0.04)X + (0.04)*(1+1/8)X
25 = 0.04x + 0.04*1.125X
25 = 0.085x
X = 25/0.085
乙队比甲队多铺多少米
= (0.04)*(1+1/8)X - (0.04)X
= 0.04X * (1+1/8 -1)
= 0.04X * (1/8)
= 0.04 * 25 / 0.085 * (1/8)
= 1.470588km
= 1470.588m
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