Question

Find the width of the shaded region in the figure given below if the circumference of the outer circle and the inner circle are 264 cm and 242 cm respectively

Answer 1

Answer:

let take 'R' be the radius of outer circle

and 'r' be the radius of inner circle

circumference of outer circle=2πR

2πR=264

2×3.14×R=264

R=264÷6.28=42.03

circumference of inner circle =2πr

2πr=242

2×3.14×r=242

r=242÷6.28=38.53

Therefore,

the width of shaded region =R-r=42.03-38.53=3.5cm