Question

Jika volume kerucut 120 pi m3 dan tingginya 10 m maka jari jari kerucut

Answer 1

Volume Kerucut = 1/3 πr² t
120 π = 1/3 π r² 10
r² = 120 : ( 3 x 10 )
r³ = 120 : 30
r² = 4

r = √4
r = 2  m

Answer 2

V = 120phi m3
t = 10 m r?
pke rumus volume dulu
V = 1/3 . phi . r2 . t
120phi = 1/3 . phi . r2 . 10
120phi . 3 = 1 . phi . r2 . 10
360phi = phi . r2 . 10
360phi/phi = r2 . 10
360 = 10r2
r2 = 360/10
r2 = 36
r = (akar dr 36) 6
jadi r nya 6