Question

Suatu kerucut memiliki volume 1.884 dm3 jika tinggi nya 8 dm tentukan panjang garis pelukis

Answer 1

V = 1/3πr²t
1.884 = 1/3 × 3,14 × r² × 8
1.884 = 25,12/3r²
r² = 1.884/25,12 × 3
r² = 225
r = √225
r = 15 cm
Panjang garis pelukis = √8² + 15²
= √64 + 225
= √289
= 17 cm