A conical pile of sand is 1.8 meters high and has a base radius of 10 meters. Each cubic meter of sand weighs about 2 tons. How many tons does this pile of sand weigh?
一个圆锥形的沙堆，高是1.8米，底面半径是10米，每立方米的沙约重2吨．这堆沙约重多少吨？
<result>376.81</result>