表面积 |
3.14x2x2.4x4+3.14x2.4²×2
=3.14x2x2.4x4+3.14x5.76×2
=60.288+36.1728
=96.4608
|
体积 |
3.14x2.4²×4
=3.14x5.76×4
=72.3456
|
⑴ |
表面积=3.14x5x2x2+3.14x5²
=3.14x5x2x2+3.14x25
=62.8+78.5
=141.3
|
⑵ |
体积=3.14x5²x2
=3.14x25x2
=157
|
⑴ |
半径=5÷2=2.5
体积=3.14x2.5²x10÷2
=3.14x6.25x10÷2
=98.125
|
⑵ |
表面积=3.14x2.5²+5x10+3.14x5x10÷2
=3.14x6.25+5x10+3.14x5x10÷2
=19.625+50+78.5
=148.125
|