Question

Luas permukaan bola = 616 cm***
ditanyakan jari2 bola tersebut ?

Answer 1

Lp =4.phi. r²
616 = 4. 22/7. r²
r² = 616×7÷88
r² = 49
r = √49
r = 7

Answer 2

Diket L = 616 cm2
ditanya r = ?
L = 4.phi x r2
616 = 4. 22/7 x r2
616 = 88/7 x r2
616/ 88/7  = r2
196 x 7/88 = r2
49 = r2
7 = r