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प्रश्न
There is a circular lawn of radius 28 m. A path of 7 m width is laid around the lawn. What will be the area of the path?
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उत्तर
Radius of the circular lawn r = 28 m
Radius of the lawn with path = 28 + 7 m = 35 m
Area of the circular path = π(R2 – r2) sq.units
Area of the path = `22/7 (35^2 - 28^2) "m"^2`
= `22/7 xx (35 + 28) (35 - 28) "m"^2`
= `22/7 xx 63 xx 7 "m"^2`
= 1386 m2
Area of the path = 1386 m2
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