Hubungan volume kerucut dan volume bola?

Volume Bola =4/3 × phi × r^3

= 2x 2/3 × phi × r×r×r

= 2 ×( 1/3× phi ×r×r× 2r)

= 2 ×(1/3 × phi × r×r×t)

= 2 × volume kerucut

catatan : ..... 2r bola = t kerucut