Jawab:
Penjelasan dengan langkah-langkah:
1. r = 10
t = 20
Diameter = 2 x 10 = 20 cm
Luas selimut = 2 x 3.14 x 10 x 20 = 1256
Luas permukaan = 2 x 3.14 x 10 x (10 + 20)
Luas permukaan = 62.8 x 30
Luas permukaan = 1884
2. Diameter = 28
t = 8
r = 28/2 = 14 cm
Luas selimut = 2 x (22/7) x 14 x 8 = 704
Luas permukaan = 2 x (22/7) x 14 x (14 + 8)
Luas permukaan = 88 x 22
Luas permukaan = 1936
3. Diameter = 7
r = 7/2 = 3.5 cm
Luas selimut = 2 x (22/7) x 3.5 x 8 = 176
Luas permukaan = 2 x (22/7) x 3.5 x (3.5 + 8)
Luas permukaan = 22 x 11.5
Luas permukaan = 253
4. r = 30
t = 100
Diameter = 2 x 30 = 60 cm
Luas selimut = 2 x 3.14 x 30 x 100 = 18840
Luas permukaan = 2 x 3.14 x 30 x (30 + 100)
Luas permukaan = 188.4 x 130
Luas permukaan = 24492
5. r = 14
t = 30
Diameter = 2 x 14 = 28 cm
Luas selimut = 2 x (22/7) x 14 x 30 = 2640
Luas permukaan = 2 x (22/7) x 14 x (14 + 30)
Luas permukaan = 88 x 44
Luas permukaan = 3872
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Jawab:
Penjelasan dengan langkah-langkah:
1. r = 10
t = 20
Diameter = 2 x 10 = 20 cm
Luas selimut = 2 x 3.14 x 10 x 20 = 1256
Luas permukaan = 2 x 3.14 x 10 x (10 + 20)
Luas permukaan = 62.8 x 30
Luas permukaan = 1884
2. Diameter = 28
t = 8
r = 28/2 = 14 cm
Luas selimut = 2 x (22/7) x 14 x 8 = 704
Luas permukaan = 2 x (22/7) x 14 x (14 + 8)
Luas permukaan = 88 x 22
Luas permukaan = 1936
3. Diameter = 7
t = 8
r = 7/2 = 3.5 cm
Luas selimut = 2 x (22/7) x 3.5 x 8 = 176
Luas permukaan = 2 x (22/7) x 3.5 x (3.5 + 8)
Luas permukaan = 22 x 11.5
Luas permukaan = 253
4. r = 30
t = 100
Diameter = 2 x 30 = 60 cm
Luas selimut = 2 x 3.14 x 30 x 100 = 18840
Luas permukaan = 2 x 3.14 x 30 x (30 + 100)
Luas permukaan = 188.4 x 130
Luas permukaan = 24492
5. r = 14
t = 30
Diameter = 2 x 14 = 28 cm
Luas selimut = 2 x (22/7) x 14 x 30 = 2640
Luas permukaan = 2 x (22/7) x 14 x (14 + 30)
Luas permukaan = 88 x 44
Luas permukaan = 3872