Question

What is area of a circle with Diameter of 14 cm?
(A) 204 sqm (B) 154 sqm
(C) 176 sqm (D) 302 sqm

Answer 1

Diameter of circle = 2 × Radius

10 = 2 × radius

5 cm = radius




We know, Arew of circle = πr^2

So,



$area \: = \frac{22}{7} \times 7 \times 7 \\ \\ \\ \: \: \: \: \: \: \: \: \: \: = 22 \times 7 \times 1 \\ \\ \\ \: \: \: \: \: \: \: \: \: = 22(10 - 3) \\ \\ \\ \: \: \: \: \: \: \: \: \: = 220 - 66 \\ \\ \\ \: \: \: \: \: \: \: \: = 154 \: {cm}^{2}$