Question

find area of circular ring the external radii is 45cm and inner radii is 21cm respectively find area of ring​

Answer 1

Answer:

4,978.285

Step-by-step explanation:

let circular ring inner reddi = 21cm

so its area = π*21*21=1386cm square

let circular ring outer reddi= 45

so it area =π*45*45=6,364.285

area of ring =6,364.285-1386=4,978.285

Answer 2

Answer:

4,978.285 this is answered