Question

The difference between perimeters of two concentric circles of radius R and r respectively is 308cm. Find the width of the path.

Answer 1

Answer:

outer circle and the inner circle (R-r) = 7 cm.

The circumference of outer circle is given as 132 cm.

Finding the radius of the outer circle,

2πR = 132

R = 21 cm

Now circumference of inner circle is given as 88 cm.

Finding the radius of inner circle,

2πr = 88

r = 14 cm

Now we have to find the difference between the radii

(R-r) = (21-14) = 7 cm