Question

(18) The inner circumference of a circular track is 220m. The
track is 7m wide every where. Calculate the cast of putting up a
fence along the outer circle at the rate of Rs. 2 per metre ​

Answer 1

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

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