Question

Find the area of circle whose circumference is 3.4cm

Answer 1

Answer:

area of circle is 0.92 cm^2

Step-by-step explanation:

$circumfence \: \: of \: circle \: = 2\pi \: r \\ 3.4 = 2 \times \frac{22}{7} \times r \\ \frac{34}{10} \times \frac{7}{22} \times \frac{1}{2 } = r \\ \frac{34 \times 7 \times 1}{10 \times 22 \times 2} = r \\ r = \frac{238}{440} \\ \\r = 0.54 \\ \\ area \: of \: circle \: = \pi {r}^{2} \\ = \frac{22 }{7} \times ( {0.54} )^{2} \\ = 3.14 \times 0.2916 \\ = 0.92 \: {cm}^{2}$