The inner circumference of a circular acupressure track is 115 m and width ofthe track is 5 m. Find the cost of puttingup a fence along the outer circle of thetrack at the rate of 120 m.

The inner circumference of a circular acupressure track is 115 m and

1.	The inner circumference of a circular acupressure track is 115 m and width ofthe track is 5 m. Find the cost of puttingup a fence along the outer circle of thetrack at the rate of 120 m.
Answer» 115 m inner circumference(given)and width 5m(given)let inner circle radius be r1circumference of SMALL circle=2πr115=2×22/7 ×r1115/2 ×7/22=r1r1=18.29(approx)let radius of BIGGER circle=(R2)which is r1+518.29+5(r2)=23.29so new circumference=2π(r2)2×22/7×23.29146.39m14639/100cost=rate×lengthcost=120×2329/10012×2329/102794.8 Rsplease mark me as BRAINLIST it is too IMPORTANT for me