Question

The radius of a circle is 3.9 cm. What is the area of the circle? Use pi= 3.14

Answer 1

Answer:

$given \\ radius = 3.9cm \\ \pi = 3.14 \\ = > area \: of \: a \: circle = \pi {r}^{2} \\ = 3.14 \times 3.9 \times 3.9 \\ = \frac{314}{100} \times \frac{39}{10 } \times \frac{39}{10} \\ = \frac{477594}{10000 } \\ = 47.7594 {cm}^{2}$

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