3.14×4×5=62.8(平方厘米);
圓柱的表面積:
62.8+3.14×(
4 |
2 |
=62.8+3.14×4×2,
=62.8+25.12,
=87.92(平方厘米);
圓柱的體積:
3.14×(
4 |
2 |
=3.14×4×5,
=62.8(立方厘米);
圓錐的體積:
62.8×
1 |
3 |
14 |
15 |
(62.8-20
14 |
15 |
14 |
15 |
=(62
4 |
5 |
14 |
15 |
14 |
15 |
=41
13 |
15 |
14 |
15 |
=
628 |
15 |
15 |
314 |
=2,
=200%;
(62.8-20
14 |
15 |
=(62
4 |
5 |
14 |
15 |
4 |
5 |
=41
13 |
15 |
4 |
5 |
=
628 |
15 |
5 |
314 |
≈0.667,
=66.7%;
答:圓柱的側(cè)面積是62.8平方厘米,表面積是87.92平方厘米,圓柱比和它等底等高的圓錐的體積多200%;圓錐的體積比它少66.7%;
故答案為:62.8;87.92;200%;66.7%.