Question

Volume bola yang luas permukaannya 22.176 cm2 dan phi = 22/7 ?

Answer 1

Lp = 4.phi .r*2
22.176 = 4 x 22/7 x r*2
22.176 = 88/7 x r*2
22.176 x 7 = 88 x r*2
155.232 / 88 = r*2
1764 = r*2 (pangkat dua)
42 = r ( jari jari bola)

volume bola
v = 4/3 phi . r*3
v = 4/3 x 22/7 x 42*3
v = 88/ 28 x 74088
v = 232848