Question

The radius of a sphere is 3.5 cm. Find the surface area

Answer 1

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Answer:

$surface \: area \: of \: sphere = 4\pi \: r {}^{2} \\ = 4 \times \frac{22}{7} \times 3.5 \times 3.5 \\ = \frac{88}{7} \times 12.25 \\ = \frac{1078}{7} \\ = 154cm {}^{2}$

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Answer 2

Step-by-step explanation:

Surface area of sphere=4(πR^2)

=4(22/7)(49/4)

=(22)(7)

=154 cm^2