Question

The difference between circumference and radius of a circle is 74cm. Find area of circle

Answer 1

The given

$2\pi \: r- r = 74 \\ r(2\pi - 1) = 74 \\ r(2 \times \frac{22}{7} - 1) = 74 \\ r( \frac{44}{7} - 1) = 74 \\ r( \frac{44 - 7}{7} ) = 74 \\ r = \frac{74 \times 7}{37 } \\ r = 2 \times 7 \\ r = 14cm \\ area \: of \: circel \\ \pi {r}^{2} \\ \frac{22}{7} \times {14}^{2} \\ \frac{22}{7} \times 14 \times 14 \\ 44 \times 14 \\ 616answer$