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Mensuration Practice Test 2
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© examsnet.com
Question : 11
Total: 40
The area of a sector of a circle is 77 sq. cm and the angle of the sector is 45°, Find the radius of the circle.
7 cm
14 cm
21 cm
28 cm
Validate
Solution:
👈: Video Solution
Area of the sector of a circle = 77 sq. cm.
Angle of the sector = 45°
Area of the circle =
45
°
360
°
×
22
7
×
r
2
= 77
1
8
×
22
7
×
r
2
= 77
r
2
=
77
×
7
×
8
22
×
1
r
2
= 196
r = 14 cm
© examsnet.com
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