The radius of one circular field is 7 m and that of another is 25m. Find the radius of the circular field whose area is equal to the difference of the areas of the first and second field.
please solve this very urgent
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Answer:
17 m
Step-by-step explanation:
As we know that,
Area of circle =π(radius)
2
Let r be the radius of the circle.
∴ Area of circle =πr
2
Area of circle of radius 12m=π(12)
2
=144π
Area of circle of radius 9m=π(9)
2
=81π
Area of circle of radius 8m=π(8)
2
=64π
Given that the area of circle equal to the sum of the areas of three smaller circular fields.
∴πr
2
=144π+81π+72π
⇒πr
2
=289π
⇒r=
289
=17m
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