Question

Find the area of a circle with a circumference of 31.4 units.

Answer 1

Given,

2πr = 31.4

2 × 22/7 × r = 31.4

44r = 219.8

r = 4.995 units ≈ 5 units

Area of circle with given radius = πr²

= 22/7 × 5 × 5

= 78.5 sq. units

Answer 2

Answer:

$0.00785sq.unit$