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A wheel makes 1000 revolutions in covering a distance of 88 km. Find the radius of the wheel.

14
13
12
11

Correct Answer: 14

Explanation:

Distance covered in one revolution = $\frac{88 \times 1000}{1000}$ = 88m.

$2 πR 2 = 88 \Rightarrow 2 \times \frac{22}{7} \times R = 88 \Rightarrow R = 88 \times \frac{7}{44}$

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