Find out the ratio of radius of outer circle to inner circle of the 14 meter wide circle track, which inner circumference is 440 m.
Option:
A. 4 : 5
B. 5 : 6
C. 6 : 5
D. 5 : 4
Answer: C . 6 : 5
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Justification:
Circumference of the circle c = 2 * pi * r = 440m => r = 440 / 2 * (22/7) = 440 * 7 / 44 = 70 m
Outer circul radius R = r + 14 = 70 + 14 = 84 m.
Ratio of the outer to inner circle = 84 / 70 = 6 : 5
