Question

Find the diameters of the circles given the following areas.
a)616mm squared
b)779 5/8m squared
c)3850cm squared

Answer 1

Answer:

a)616mm squared

22/7×r^2=616

r^2=616×7/22

r^2=196

r= 14 cm

circumference= 2×22/7×14=88cm^2

Ans = 88cm^2

c)3850cm squared

As 3850 cm square is the area of circle

then, 22/7×radius square = 3850 cm square

radius square=3850×7/22 cm square

radius square =175×7cm square

radius square =1225cm square

radius=square root of 1225cm square

radius=35cm

now,

circumference of circle is 2×22/7×radius

c=44/7×35

circumference is 220 cm.

HOPE IT WILL HELP YOU...