Find the radius of a circle in which an arc of length 44cm subtends angle...
MATHEMATICS
WAEC 1997
Find the radius of a circle in which an arc of length 44cm subtends angle 200° at the centre of the circle. [Take π = 22/7]
- A. 3.9cm
- B. 12.6cm
- C. 25.2cm
- D. 38.4cm
Correct Answer: B. 12.6cm
Explanation
44 = 200/360 x 2 x 22/7 x r
r = 360 x 7 x 44/200 x 2 x 22
= 12.6cm
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