Question

A circular path of width 2m along the boundary is inside the circular park of radius 16m.

Find the cost of paving the path with bricks at the rate of Rs.25/- per m2

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Answer 1

Answer:

Rs. 2669

Step-by-step explanation:

Here inner radius(r) of park is 16m and width on boundary is 2m.

Hence, outer radius(R) is 18m.

area of circular path = outer area - inner area

( we know area of circle is πr²,where r is radius.)

area of circular path   = πR² - πr²

                                 = π(R² - r²)

                                 = π(18²-16²)

                                 = π(18+16)(18-16)

                                 =34π m²

Cost of paving= 34π x 25 =850π

                                          =850 x 3.14 = 2669