Question

A circular park has a path uniform width around it . the difference between the outer and inner circumference of the circular park is 132cm . find its width

Answer 1

Given that 2π(r1-r2)=132
π(r1-r2)=66
22/7(r1-r2)=66
1/7(r1-r2)=3
r1-r2=21cm
Hence 21 cm is the width of the path

Answer 2

Answer:

21 cm

Explanation:

The formula for the circumference of the circle = 2π r

Let the radius of the outer circle =R

Let the radius of the inner circle = r

Circumference of the outer circle = 2π R

Circumference of the inner circle = 2π r

The difference = 2π R - 2π r = 132 cm

R - r = 132 / 2π = 132 × 7 / 2 × 22 = 21 cm

Thus, the width = 21 cm