Question

19. Find the diameter of a circle whose area is 628 cm² (use t = 3.14).​

Answer 1

Answer:

Given area of circle=628 cm^2

area=2×pie×r^2

2×pie×r^2=628

2×3.14×r^2=628

6.28×r^2=628

r^2=628÷6.28

r^2=62800÷628

r^2=100

r=10 cm

Diameter(d)=2×r

d=2×10

d=20 cm