50. If a sphere has a surface area of 324 cm, find the volume of the sphere.?

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2007-05-31 16:02:48 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

A = 4pi r^2

324 = 4pi r^2
r^2 = 324/4pi
r = sqrt(324 / 4pi)

V = 4/3 pi r^3

V = 4/3 pi * (sqrt(324 / 4pi)^3

plug in a calculator

V = 548.39 cm^3

2007-05-31 16:08:34 · answer #1 · answered by 7 · 0⤊ 0⤋

4πr² = 324
r² = 324 / 4π
r = 5.08 cm
V = (4/3) x π x 5.08³ cm³
V = 549 cm³

2007-05-31 20:47:32 · answer #2 · answered by Como 7 · 0⤊ 0⤋

A=234cm^3=4π r^2
r=√(234/4π)

V=4π/3 r^3
V=4π/3 *(√(58.5/π))^3
V=4π/3*58.5/π *√(58.5/π)
V=78*√(58.5/π)
V=336.6cm^3

2007-05-31 16:12:23 · answer #3 · answered by yupchagee 7 · 0⤊ 0⤋