RRB NTPC · Question 78
A wheel has a diameter of 84 cm. How many revolutions should it make to cover a distance of 792 m? (π = 22/7)
Show answer & explanation
Answer: (B) 300
Explanation
Circumference = πd = 22/7 × 84 = 264 cm. Revolutions = 79200/264 = 300.