Question

Find the radius of a circle whose circumference is 176 cm.
The radius of two circles are 8 cm and 6 cm respectively. The radius of the circle having area equal to the sum of the areas of the two circles is
​

Answer 1

Given Circumference =176 cm

i.e; 2πr=176 cm

we want radius

′

r

′

2×

7

22

×r=176

r=176×

22

7

×

2

1

r=

44

1232

r=28

∴ Radius of circle

r=28 cm

Answer 2

Find the radius of the circle having area equal to the sum of the areas of the two circles. So, radius of the third circle will be 10cm