Area and Perimeter Practice Test 2

Question : 6 of 40

Marks: +1, -0

The area of circle whose radius is 6 cm is trisected by two concentric circles. The radius of the smallest circle is:

Solution:

Area of the smallest circle =

1/3 × π × 6^2

12 π cm^2

Hence, radius of the smallest circle =

√{{12π}/π}

2 √3

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