题目内容
(1)求圆柱表面积、体积.
(2)求圆锥的体积

(2)求圆锥的体积
(1)圆柱的表面积:
3.14×10×10+3.14×(10÷2)2×2,
=3.14×10×10+3.14×25×2,
=314-157,
=157,
圆柱的体积:
3.14×(10÷2)2×10,
=3.14×25×10,
=785.
(2)圆锥的体积:
×3.14×(5÷2)2×4.5,
=
×3.14×6.25×4.5,
=29.4375.
3.14×10×10+3.14×(10÷2)2×2,
=3.14×10×10+3.14×25×2,
=314-157,
=157,
圆柱的体积:
3.14×(10÷2)2×10,
=3.14×25×10,
=785.
(2)圆锥的体积:
| 1 |
| 3 |
=
| 1 |
| 3 |
=29.4375.
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