一个圆锥形沙堆,底面积是45.9m2,高1.2m.用这堆沙在12m宽的路面上铺3cm厚的路基,能铺多少米?

问题描述:

一个圆锥形沙堆,底面积是45.9m2,高1.2m.用这堆沙在12m宽的路面上铺3cm厚的路基,能铺多少米?

3厘米=0.03米,

1
3
×45.9×1.2÷(12×0.03),
=18.36÷0.36,
=51(米).
答:能铺51米.