A wheel travels a distance of 22 km in 2500 revolutions. What is the diameter of the wheel? (Take π = 22/7)
A2.8 m
B1.4 m
C5.6 m
D3.5 m
Answer & Solution
Correct answer: A. 2.8 m
1. Distance per revolution = total distance / revolutions = 22000 m / 2500 = 8.8 m.
2. This equals the circumference, so πd = 8.8, giving d = 8.8 × 7/22.
3. d = 61.6/22 = 2.8 m.
_Source: RRB Group D (RRC) PYQ, held 27-10-2013, Q.99._
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