Question

Find the surface area of a sphere of diameter:
21 cm​

Answer 1

Answer:

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Step-by-step explanation:

A≈1385.44

Answer 2

Step-by-step explanation:

Radius=diameter/2

21/2 =10.5 cm

Surface area = 4pier^2

=4pie × (10.5)^2 =4 × 22/7 × 10.5^2

=1386cm^2