h=(3.14×1.5×1.5×0.2)÷(1/3×3.14×0.15×0.15)
=3×(1.5×1.5×0.2)÷(0.15×0.15)
=3×10×10×0.2
=3×20
=60 米
所以这个圆锥形坑60米