Question on: JAMB Mathematics - 2007
Calculate the length of an arc of a circle diameter 14 cm, which substends an angle of 90o at the center of the circle
A
7π/2 cm
B
7π cm
C
14π cm
D
7π/4 cm
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Correct Option: A
Length of an arc = θ/360 x 2πr
90/360 x 2 x π x 7
= 7π/2
90/360 x 2 x π x 7
= 7π/2
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