The inner circumference of a circular track is 220m and the width of the track is 7m. Calculate the cost of putting up a fence along the outer circle of the track at the rate of 50 per m.
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Answer:
Circumference of inner side = 220m
⇒2πr=220⇒r=
44
220×7
=35m
Now, width of track =7m
∴ Outer radius =35+7=42m
Therefore outer circumference =2πR=2×
7
22
×42=264m
∴ Cost of fencing = Rs. (264×2) = Rs. 528
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