Arithmetic Ability
Area

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Q.

The inner circumference of a circular race track, 14 m wide, is 440 m. Find radius of the outer circle

View Answer

Correct choice: D

Explanation:

Let inner radius be r metres. Then, 2πr = 440 ; r = 440×744 = 70 m. Radius of outer circle = (70 + 14) m = 84 m.
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