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JAMB Mathematics 2014 Paper
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© africaexams.com
Question : 47
Total: 47
If the angle of a sector of a circle with radius 10.5 cm is 120°, find the perimeter of the sector. [Take
π
=
22
7
]
48 cm
40 cm
43 cm
45 cm
Validate
Solution:
Perimeter of the sector =
2
r
+
θ
360
°
×
2
π
r
=
2
(
10.5
)
+
120
360
×
2
×
22
7
×
10.5
=
21
+
22
= 43 cm
© africaexams.com
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