Question

the inner circumference of a circular track is 220m.a path 7m wide run around the track find the cost of fencing the outer circle at rs2 per meter

Answer 1

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