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7. The diameter of a circular garden is 84 m. On itsoutside, there is around 3,5 m wide. Find the cost ofconstructing the road at 20 per square meter,​

Answer»

Step-by-step explanation:

As we know that the diameter of GARDEN is 84 mtr

it means radius is = 42 mtr

so AREA of garden is = 22/7× 42×42

=> 5544 M²

and it is also given that there is a round path of 3.5 mtr

so in this case redius becomes = 42-3.5 = 38.5

so area of smaller circle is = 22/7×38.5×38.5 = 4658.5 m²

area difference = 5544-4658.5 = 885.5m²

not cost of 1m² = 20

so

885.5 × 20 = 17710 rs


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