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
7Ï€/2 cm
B
7Ï€ cm
C
14Ï€ cm
D
7Ï€/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
= 7Ï€/2
90/360 x 2 x π x 7
= 7Ï€/2
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