Given : circumference of a circle exceeds its diameter by 45cm.⇒ Circumference of circle =45+ Diameter of circle ⇒2πr=45+2r⇒2r(π−1)=45⇒2r(722​−1)=45⇒715​r=245​∴r=10.5Circumference of a circle =2πr=2×722​×10.5=66cm