Question

Area of a circle is 154 sq. cm. Find its radius and circumference


tell answer with explanation ​

Answer 1

$\sf \Large Solution!!$

Area = 154 cm²

Area = πr²

154 cm² = (22/7) × r²

r² = (7/22) × 154 cm²

r² = 49 cm²

r = $\sf \sqrt{49\:cm^{2}}$

r = 7 cm

$\boxed{\blue{\sf Radius=7\:cm}}$

Circumference = 2πr

Circumference = 2 × (22/7) × 7 cm

$\boxed{\blue{\sf Circumference=44\:cm}}$