1. The radius of the circular field is equal to the side of a square field. If the difference between the area of the circular field and area of the square field is 195 m2, what is the perimeter of the circular field ? (in m)
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By: anil on 05 May 2019 01.40 am
Let radius of circular field = side of square field = $$x$$ m Acc. to ques, => $$(pi x^2) - (x^2) = 195$$ => $$x^2 (frac{22}{7} - 1) = 195$$ => $$x^2 imes frac{15}{7} = 195$$ => $$x^2 = 195 imes frac{7}{15} = 91$$ => $$x = sqrt{91} approx 9.5$$ m $$ herefore$$ Perimeter of the circular field = $$2 pi x$$ = $$2 imes frac{22}{7} imes 9.5 = 59.71 approx 60$$ m
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