Question

If the area of a circle is 15400 cm2, find its radius and circumference

Answer 1

Answer:

area of a circle= πr²

so , let's take radius as X

22/7×x×x= 15400 cm²

x² =15400× 7/22

x²=4900

X=√4900

X= 70

so, radius of the circle= 70 cm

circumference of a circle= 2πr

2×22/7×70 =440 cm

Answer 2

Answer:

Radius = 70 cm

Circumference = 440 cm