Question

If a wheel covers a distance of 660 m in 30 rotations, then the diameter of the wheel is?

A 3.5 m Correct Answer Incorrect Answer
B 14 m Correct Answer Incorrect Answer
C 7 m Correct Answer Incorrect Answer
D 21 m Correct Answer Incorrect Answer

Solution

Distance covered in 30 rotations = 660 m Distance covered in 1 rotations = 660/30 = 22 m ∴ Distance covered in 1 rotation = circumference of the wheel 2πr = 22m 2r (diameter) = (22 × 7)/22 = 7 m

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