Question

The inner circumference of a circular track 220 m and the width of the track is 14 m. calculate the cost of putting up a fence along the outer circle of the track at the rate of 20 per m.​

Answer 1

Answer:

Rs. 528

Step-by-step explanation:

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