Question

Latihan 6 no.1 =
Hitunglah volume kerucut dengan ukuran berikut ini!
a. panjang jari-jari alas 21 cm dan 10 cm
b. diameter alas 12 cm dan tinggi 7 cm.

Answer 1

A. lk= 1/3 x la x t
=1/3 x 3,14 x 21 x 21 x10
=7 x 31,4 21
=4615,8 cm kubik

b. lk= 1/3 x 22/7 x 6 x 6 x 7
=12 x 22
=244 cm kubik 

Answer 2

V = 1/3 × phi x r x r x t
= 1/3 × 22/7 × 21 × 21 × 10
= 4620 cm kubik

V = 1/3 x phi x r x r x t
= 1/3 × 22/7 × 6 × 6 × 7
= 264cm kubik