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k0ka [10]
3 years ago
8

A sphere has a volume of 850 m^3 find its surface area

Mathematics
1 answer:
VashaNatasha [74]3 years ago
7 0

Answer:

SA ≈ 434.5 cm²

Step-by-step explanation:

The volume (V) of a sphere is calculated as

V = \frac{4}{3}πr³ ( r is the radius )

The surface area (SA) is calculated as

SA = 4πr²

To find r use the volume formula

\frac{4}{3}πr³ = 850 ( multiply both sides by \frac{3}{4} to clear the fraction )

πr³ = 637.5 ( divide both sides by π )

r³ = \frac{637.5}{\pi } ( take the cube root of both sides )

r = \sqrt[3]{\frac{637.5}{\pi } } ≈ 5.88 cm ( to 2 dec. places )

Then

SA = 4π × 5.88² ≈ 434.5 cm² ( to 1 dec. place )

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