Penjelasan dengan langkah-langkah:
19) B
V = πr²t
r² = 1.570/(3,14x5)
r² = 1.570/15,7
r² = 100
r = √100
r = 10 cm
Lp = 2πr(r + t)
Lp = 2x3,14x10x(10+5)
Lp = 62,8 x 15
Lp = 942 cm²
20) A
V = ⅓πr²t
t = 3x157/(3,14x5²)
t = 471/78,5
t = 6 cm
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Penjelasan dengan langkah-langkah:
19) B
V = πr²t
r² = 1.570/(3,14x5)
r² = 1.570/15,7
r² = 100
r = √100
r = 10 cm
Lp = 2πr(r + t)
Lp = 2x3,14x10x(10+5)
Lp = 62,8 x 15
Lp = 942 cm²
20) A
V = ⅓πr²t
t = 3x157/(3,14x5²)
t = 471/78,5
t = 6 cm