Question

The inner and Outer circumference of a circular ring are 132 cm and 154 cm respectively find the width of the Ring

Answer 1

circumference of outer ring = 154 cm
circumference of circle = 2 pie *  r =154 => r = 154*7/2*22
radius of outer ring = 49/2 = 24.5 cm

circumference of inner ring = 132 cm
circumference of circle = 2 pie *  r =132 => r = 132*7/2*22 
radius of outer ring = 42/2 =21 cm

width of ring = 24.5 -21 = 3.5cm