in a circular garden of diameter 150m, a pond is constructed in the form of a circle with radius 20m. find the area of the land left out
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Answer:
diameter of garden = 150m
so, radius = 150/2
= 75m
area of garden = π r^2
= 22/7×75×75m^2
area of pond = πr^2
= 22/7×20×20m^2
area left = area of garden - area of pond
= 22/7×75×75- 22/7×20×20
= 22/7(75×75-20×20)
= 22/7(5625-400)
= 22/7×5225
= 16421.42m^2
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