2016 · Q67
The wheels of a car are of diameter 80 cm each. The car is travelling at a speed of 66 km/hour. What is the number of complete revolutions each wheel makes in 10 minutes ?
Elementary MathematicsMensuration
- A4275
- B4350
- C4375
- D4450
Explanation
Distance covered in 10 min at 66 km/h = 11 km = 11,00,000 cm. Each wheel's circumference is 80π = 1760/7 cm. Revolutions = 1100000×7/1760 = 4375 (option C).