圆柱体积:3.14×(3÷2) 2×4,
=3.14×2.25×4,
=7.065×4,
=28.26(立方厘米);
圆锥的体积:
1
3 ×3.14×(3÷2) 2×(4×
3
4 ),
=
1
3 ×3.14×2.25×3,
=3.14×2.25,
=7.065(立方厘米);
陀螺的体积:28.26+7.065=35.325(立方厘米)≈35(立方厘米);
答:这个陀螺的体积是35立方厘米.
圆柱体积:3.14×(3÷2) 2×4,
=3.14×2.25×4,
=7.065×4,
=28.26(立方厘米);
圆锥的体积:
1
3 ×3.14×(3÷2) 2×(4×
3
4 ),
=
1
3 ×3.14×2.25×3,
=3.14×2.25,
=7.065(立方厘米);
陀螺的体积:28.26+7.065=35.325(立方厘米)≈35(立方厘米);
答:这个陀螺的体积是35立方厘米.