If the radius of the circular field is equal to the side of a square field If the difference between...........

Quantitative Aptitude ( CCS) Mensuration 2D

If 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 5145 sq. m ,then calculate the perimeter of the circular field?

300 m

302 m

305 m

308 m

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Explanation:

Let the radius of the circular field and the side of the square field be r Then,
π*r² – r² = 5145
=> r²[(22-7)/7] = 5145
=> r = 49 m
Therefore ,
circumference of the circular field = 2*π*r =308m