Question

Find the surface area of the sphere to the nearest square unit. Use a calculator.

Answer 1

$surface \: area \: of \: sphere \: = 4\pi {r}^{2}$

Given,

diameter = 2 inch

$radius = \frac{diameter}{2}$

$radius = \frac{2}{2}$

$radius \: = \: 1 \: inch$

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Substituting the value in formula

$= 4 \times3.14 \times {1}^{2}$

$= 4 \times 3.14 \times 1$

$= 12.56 \: {inch}^{2}$