Question

find the radius of circle whose area is
$154cm { }^{2}$
​

Answer 1

Answer:

Step-by-step explanation:

Area of cirvle=pi r ^2

pi r^2=154

22/7r^2=154

r^2=(154×7)/22

r^2=49

r=7

Answer 2

Answer:

Radius=7cm

Step-by-step explanation:

$\implies area = \pi r^2 \\\implies 154 \: cm^2 = \frac{22}{7} \times r^2 \\\implies 154 \: cm^2 \times \frac{7}{22} = r^2\\\implies 49 \: cm^2 = r^2 \\\implies \sqrt{49} \: cm = r \\\implies 7 \: cm = r \\\implies r = 7\:cm$