Penjelasan dengan langkah-langkah:
¤ Bangun ruang
Lingkaran A : Lingkaran B
2 : 27
K . Ling . A 2
--------------- = -------
K . Ling . B 27
x 2
------------- = -----
25,2 cm 27
27x = 50,4 cm
x = 1,86666..... ~1,9 cm
K . Ling . A = πd
1,9 cm = πd
1,9 cm/3,14 = d
0,6 = d
0,3 = r
K . Ling . B = πd
25,2 cm = πd
25,2 cm/3,14 = d
8 = d
4 = r
L . Ling . A = πr ²
= (3,14)((0,3)²)
= 0,2826 cm ²
L . Ling . B = πr ²
= (3,14)(4 ²)
= 50,24 cm ²
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Penjelasan dengan langkah-langkah:
¤ Bangun ruang
Lingkaran A : Lingkaran B
2 : 27
K . Ling . A 2
--------------- = -------
K . Ling . B 27
x 2
------------- = -----
25,2 cm 27
27x = 50,4 cm
x = 1,86666..... ~1,9 cm
K . Ling . A = πd
1,9 cm = πd
1,9 cm/3,14 = d
0,6 = d
0,3 = r
K . Ling . B = πd
25,2 cm = πd
25,2 cm/3,14 = d
8 = d
4 = r
L . Ling . A = πr ²
= (3,14)((0,3)²)
= 0,2826 cm ²
L . Ling . B = πr ²
= (3,14)(4 ²)
= 50,24 cm ²