A circular grassy plot of land 21m in radius, has a path 2.1 m wide running round it on the outside. Find the
cost of gravelling the path at 150 per m2.
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Step-by-step explanation:
Area of the circle
=πr^2
=22/7×21×21
=1386m^2
Area of circle along with the path
=πr^2
=22/7×23.1×23.1
=1677.06m^2
Area of the path =Area of the circle along with the path-Area of circle
=1677.06-1386
=291.06m^2
Cost of gravelling
=291.06×150
=43659m^2
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