Question

5. A wire in the form of a rectangle 18.7 cm long and 14.3 cm wide is
reshaped and bent into the form of a circle. Find the radius of the circle so
formed. Also find which figure encloses more area?​

Answer 1

Answer:

Perimeter of rectangle=(18.7+14.3)×2=33×2=66 cm

Circumference of circle= perimeter of rectangle

⇒2πr=66

⇒r=

2π

66

⇒r=

2

66

×

22

7

⇒r=

2

21

∴r=10.5 cm

So, radius of circle =10.5 cm