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

44
22
33
84

Correct Answer: 84

Explanation:

Let inner radius be r metres. Then, 2 $π$ r = 440 ; r = $440 \times \frac{7}{44}$ = 70 m.

Radius of outer circle = (70 + 14) m = 84 m.

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