hitunglah volume bola jika diketahui: a. jari jari 10 cm, b. diameter 35 cm, dan c. luas permukaan bola 616 cm2

a. v = 4/3 Π r³
= 4/3 x 3,14 x 10³
= 40/3 x 314
= 12560/3
= 4186,3 cm³

A).
Volume = 4/3 x π x r³
= 4/3 x 22/7 x 10³
= 4/3 x 22/7 x 1000
= 4/3 x 3142,857
= 4190,476 cm³

B). Diameter = 35 cm
Jari-jari = Diameter/2 = 35/2 = 17,5 cm

Volume = 4/3 x π x r³
= 4/3 x 22/7 x 17,5³
= 4/3 x 22/7 x 5359,375
= 22458,33 cm³

C).
Luas permukaan = 4 x π x r²
616 = 4 x 22/7 x r²
616 = 88/7 x r²
r² = 616 x 7/88
r² = 49
r = √49
r = 7 cm

Volume = 4/3 x π x r³
= 4/3 x 22/7 x 7³
= 4/3 x 22/7 x 343
= 4/3 x 1078
= 1437,33 cm³