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12 August, 05:47

Find the surface area of the sphere with the given dimension. Leave your answer in terms of pi.

1.) Radius of 60m.

2.) Diameter of 14 cm.

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  1. 12 August, 08:17
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    The surface area of the sphere:

    A = 4 r² π

    1) r = 60 m;

    A = 4 · 60² π = 4 · 3600 π = 14,400 π m²

    2) Diameter of 14 cm:

    r = 14 cm / 2 = 7 cm

    A = 4 · 7² π = 4 · 49 π = 196 π cm²
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