Berapa cm panjang diameter kerucut tersebut?
Jawaban:
Diketahui volume kerucut = V = 462 cm³
Tinggi kerucut = t = 4 cm
V = ⅓ × πr² × t
462 = ⅓ × ²²/₇ × r² × 4
462 = ²²/₂₁ × r² × 4
462 × 21 = 88r²
9.702 = 88r²
r² = 9.702
88
r² = 110,25
r = 10,5
Diameter = d = 2r = 2 × 10,5 = 21
Makara, panjang diameter kerucut tersebut yakni 21 cm.