Question

The diameter of a circular park is 84 m. On its outside, there is a 3.5 m wide road Find the cost of constructing the road at ₹ 240 per m².

Answer 1

Area of the road=(pi/4)*(square of outer diameter - square of inner diameter)
Inner diameter=84m
Outer diameter=84+3.5+3.5=91m
Total cost=(area of the road)*240