the inner circumference of a circular track is 220 m. The track is 7 m wide everywhere. Calculate the cost of putting fence along the outer circle at Rs.2 per metre.
radius of the inner circle = x
220=2x
220=2*22/7*x
220*7 = 44x
1540= 44x
x=1540/44
=35m
35m is theradius of the inner circle so the radius of the outer circle will be 35+7=42m
Cost of fencing the outer circle = {circumference of the outer circle* 2}
(2*22/7*42}*2
{44*6}*2
264*2
528RS