Area and Perimeter Practice Test 4

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Question : 15 of 40

Marks: +1, -0

A sector of 120°, cut out from a circle, has an area of

9 3/7 cm^2

. Find the radius of the circle.

3 cm
6 cm
9 cm
10 cm

Solution:

Here,

{120}/{360} × {22}/7 × r^2

=

{66}/7

⇒

r^2

=

{66×3}/{22}

∴ r = 3 cm

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