Question

Diketahui sebuah kerucut mempunyai tinggi=39 cm, diameter =14 cm. Hitunglah volume dan luas permukaan kerucut

Answer 1

Verified answer

3,14×7×7=3,14×14=43,96

Answer 2

D = 14 cm
r = 7 cm
t = 39 cm

Volume
= ⅓ × π × r² × t
= ⅓ × 22/7 × 7 × 7 × 39
= 2.002 cm³

s = √( 39² + 7²)
s = √(1.521 + 49)
s = √1.570
s = 39,6 cm

Lp = π r (s + r )
= 22/7 × 7 ( 39,6 + 7 )
= 22 × 46,6
= 1.025,2 cm²