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1. A wheel makes 1000 revolutions in covering a distance of 88 km. The diameter of the wheel is---
- A. 28m
- B. 28m
- C. 28m
- D. 28m
Answer: Option A
Explanation:
A distance equal to the circumference of the wheel is covered in each revolution.
So, 1000 x circumference = total distance
or, 1000 x 2πr = 88000 [in meter]
or, 2r = 88000 / (1000 x π )
or, diameter = 28 m
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