Radius of outer ring = $$\\displaystyle R = 23 \\  cm$$Radius of inner ring =r=12 cmArea of outer circle =πR2=722​×23×23=1662.5 cm2Area of inner circle = πr2= 722​×12×12=452.2 cm2Area of Ring = outer area - inner area=1662.5−452.2=1210Area of the ring is =1210 cm2