Question

the diameter of a circular Park is 84 M 3.5 M Wide Road runs on the outside around it find the cost of constructing the road at rupees 200 per metre square

Answer 1

Radius of the Park is 84/2 = 42 M
Formula of area of circle is
$\pi \times {r}^{2}$
then the area of the park is
$\pi \times {42}^{2} = 5544 \: {m}^{2}$
radius with the road is 42+3.5 = 45.5 M
the area with the road
$\pi \times {45.5}^{2} = 6506.5 \:{m}^{2}$
then the area of the road is
(6506.5-5544) = 962.5 M.square

cost is 962.5×200 = 192500 Rs.

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Answer 2

Answer:

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