Question

计算下列圆锥的体积 1.底是30cm2,高是18cm 2.底面3dm,高5dm 3.d=9m,高9m

Answer 1

圆锥的体积：

1.

V = sh/3

= 30×18/3

= 180 立方厘米

2.

V = sh/3

= 3×5/3

= 5 立方分米

3.

R = 9/2 = 4.5m,h = 9m

V = πR²h/3

= 3.14×4.5²×9/3

= 190.8 立方米