In a circular field, there is a rectangular tank of length 130 m and breadth 110 m. If the area of the land portion of the field is 20350 m2 then the radius of the field is
Explanation:
Area of a circular field = πr2
Area of tank = 130 × 110 = 14300 m2
∴ πr2 – 14300 = 20350
∴ πr2 = 34650
r2 = 1575 × 7 = 225 × 49
r = 15 × 7 = 105 m
Hence, option 3.
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