Question

4. A track is in the form of a ring whose inner and outer circumference are 8 m and 132 m respectively,
Find the breadth of the track.
Find the area of a circular ring whose inner and outer radii are 16 cm and 19cm, respectively.
6. In a circular garden of 50 m radius, a pond is constructed in the form of a circle with radius 20 m. Find
the area of the land left-out.
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Answer 1

Answer:

4.10056 is the best answer of this question