Question

7. The outer and inner diameters of a circular
ring are 34 cm and 32 cm respectively, then
find the area of the ring.
​

Answer 1

Given: For Ring I⇒ r1=16 and r2=17

           

We have 

Area of ring  I = (π×172−π×162)cm2

                        =22/7×(172−162)cm2 

                        =22/7×(17+16)(17−16)cm2 

              =22/7×33cm2

or. =103.714cm²