V = ⅓ × π × r × r × t
V = ⅓ × 3,14 × 12 × 15 × 15
V = 1 × 3,14 × 4 × 15 × 15
V = 12,56 × 15 × 15
V = 188,4 × 15
V = 2.826 cm³
LP = π × r × (r + s)
LP = 3,14 × 12 × (12 + 15)
LP = 3,14 × 12 × 27
LP = 37,68 × 27
LP = 1.017,36 cm²
Jawaban:
luas = 678,24 cm²
volume = 1017,36 cm³
Penjelasan dengan langkah-langkah:
diket:
s = 15 cm
t = 12 cm
r = √15²-12²
= √225-144
r = √81
r = 9 cm
ditanya ;
luas permukaan dan volume...?
jawab;
luas permukaan kerucut ;
L = π × r ( s + r)
= 3,14 × 9 ( 15 + 9)
= 3,14 × 9 × 24
L = 678,24 cm²
Volume ;
V = ⅓ × π × r² × t
= ⅓ × 3,14 × 9² × 12
= 3,14 × 81 × 4
= 1017,36 cm³
jadi luas permukaan kerucut adalah 678,24 cm²
dan volume kerucut adalah 1017,36 cm³
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V = ⅓ × π × r × r × t
V = ⅓ × 3,14 × 12 × 15 × 15
V = 1 × 3,14 × 4 × 15 × 15
V = 12,56 × 15 × 15
V = 188,4 × 15
V = 2.826 cm³
LP = π × r × (r + s)
LP = 3,14 × 12 × (12 + 15)
LP = 3,14 × 12 × 27
LP = 37,68 × 27
LP = 1.017,36 cm²
Jawaban:
luas = 678,24 cm²
volume = 1017,36 cm³
Penjelasan dengan langkah-langkah:
diket:
s = 15 cm
t = 12 cm
r = √15²-12²
= √225-144
r = √81
r = 9 cm
ditanya ;
luas permukaan dan volume...?
jawab;
luas permukaan kerucut ;
L = π × r ( s + r)
= 3,14 × 9 ( 15 + 9)
= 3,14 × 9 × 24
L = 678,24 cm²
Volume ;
V = ⅓ × π × r² × t
= ⅓ × 3,14 × 9² × 12
= 3,14 × 81 × 4
= 1017,36 cm³
jadi luas permukaan kerucut adalah 678,24 cm²
dan volume kerucut adalah 1017,36 cm³