Question

A wire in the form of 18.7cm long and 14.3cm wide is reshaped and bent into the form of a circle. Find the radius of the circle is formed.​

Answer 1

Step-by-step explanation:

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

Circumference of circle= perimeter of rectangle

⇒2πr=66

⇒r= 66÷2π

⇒r= 66÷2×7÷22

⇒r= 21/2

∴r=10.5 cm

So, radius of circle =10.5 cm

Answer 2

Answer:

10.5 cm

Step-by-step explanation:

Length = 18.7 cm = 187/10 cm

Breadth = 14.3 cm = 143/10 cm

Perimeter = 2(l + b) = 2 × (187 + 143)/10

= 66 cm = Circumference of the circle

2πr = 66

r = 66 × 1/π × 1/2 = 33 × 7/22 = 3 × 7/2 = 10.5 cm