The diameter of a car's wheel is 48 cm. If the car travels at an average speed of 35 km/h, what is the approximate number of revolutions made by the wheel per minute?
Q1. The diameter of a car's wheel is 48 cm. If the car travels at an average speed of 35 km/h, what is the approximate number of revolutions made by the wheel per minute?
Answer: 387
Explanation: Circumference of wheel = π × 0.48 m. Speed = 35 km/h = 35000/60 m/min. Revolutions/min = 35000/(60 × π × 0.48) ≈ 387.