the diameter of a circular Park is 140 metre around it on the outside a path of width of 7 is constructed if the path has to be fenced from inside and outside at rate of 7 metre find its cost
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Answer:
Rs. 6468
Step-by-step explanation:
Inner circumference: 2πr = 140π
Outer circumference: 2πr = 2(70+7)π = 154π
Total fence needed = 140π + 154π = 294π
Cost = 7 x 294π
= 7 x 22/7 x 294
= 22 x 294
= Rs. 6468
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