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A circular pond is of diameter 17.5 m. It is surrounded by a 2 m wide path. Find the cost of constructing the path at the rate of Rs. 25 per square meter( use π = 3.14)

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Given, 

Diameter of circular pond = 17.5 m 

Radius of circular pond = \(\frac{17.5}2\) = 8.75 m 

Radius of outer circle = (radius of inner circle + width of circular path) 

= 8.75 + 2 = 10.25 m 

Area of circular path = (area of outer circle – area of inner circle) 

= π(R2 – r2

= π(R + r)(R - r) 

\(\frac{22}7\) (10.75 + 8.75)(10.75 - 8.75) 

\(\frac{22}7\) × 19.50 × 2 = 3061.50 m2

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