Question

Tolong bantu jawab ya plizzz

1.Hitungan Volume bola dengan
a.jari jari 30cm (phi=3,14)
b.diameter 21cm (phi = 22/7)

Answer 1

A. V= 4/3 pi r^2
      = 4/3 x 3.14 x 30 x 30
      = 3768 cm^3
b. V= 4/3 pi r^2
      = 4/3 x 22/7 x 10.5 x 10.5
      = 462 cm^3

Answer 2

A.v=4/3 × phi × r^3
v=4/3×3,14×30×30×30
v=113040
b.v=4/3×22/7×10,5^3
= 4851