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1.
Diameter :
2 × 14 cm
= 28 cm

Luas Alas :
L = πr²
L = 22/7 × 14 × 14
L = 22 × 2 × 14
L = 44 × 14
L = 616 cm²

Volume :
V = πr²t
V = 22/7 × 14 × 14 × 30
V = 22 × 2 × 420
V = 44 × 420
V = 18.480 cm³

2.
Diameter :
2 × 28 cm
= 56 cm

Luas Alas :
L = πr²
L = 22/7 × 28 × 28
L = 22 × 4 × 28
L = 88 × 28
L = 2.464 cm²

Volume :
V = πr²t
V = 22/7 × 28 × 28 × 40
V = 22 × 4 × 1.120
V = 88 × 1.120
V = 98.560 cm³

3.
Jari - Jari :
½ × 70 cm
= 35 cm

Luas Alas :
L = πr²
L = 22/7 × 35 × 35
L = 22 × 5 × 35
L = 110 × 35
L = 3.850 cm²

Volume :
V = πr²t
V = 22/7 × 35 × 35 × 65
V = 22 × 5 × 2.275
V = 110 × 2.275
V = 250.250 cm³

4.
Diameter :
2 × 70 cm
= 140 cm

Luas Alas :
L = πr²
L = 22/7 × 70 × 70
L = 22 × 10 × 70
L = 220 × 70
L = 15.400 cm²

Volume :
V = πr²t
V = 22/7 × 70 × 70 × 100
V = 15.400 × 100
V = 1.540.000 cm³

5.
Jari - Jari :
½ × 200
= 100 cm

Luas Alas :
L = πr²
L = 3,14 × 100 × 100
L = 314 × 100
L = 31.400 cm²

Volume :
V = πr²t
V = 3,14 × 100 × 100 × 140
V = 314 × 14.000
V = 4.396.000 cm³

Maaf Kalau Salah

1.Jari jari=14 cm
   Diameter=28 cm
   Luas alas=616 cm²
   Tinggi tabung=30 cm
   Volume=1.8480 cm³
2.Jari jari=28 cm
   Diameter=56 cm
   Luas alas=2.464 cm²
   Tinggi tabung=40 cm
   Volume=98.560 cm³
3.Jari jari=35 cm
   Diameter=70 cm
   Luas alas=3850 cm²
   Tinggi tabung=65 cm
   Volume=250.250 cm³
4.Jari jari=70 cm
   Diameter=140 cm
   Luas alas=15.400 cm²
   Tinggi tabung=100 cm
   Volume=1.540.000 cm³
5.Jari jari=100 cm
   Diameter=200 cm
   Luas alas=220.000/7 atau 31.400 cm²
   Tinggi tabung=140 cm
   Volume=4.400.000 cm³(phi=22/7) atau 4.396.000 cm³( phi=3,14)
  
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