2016 · Q56
The number of rounds that a wheel of diameter 7/11 metre will make in traversing 4 km will be
Elementary MathematicsMensuration
- A500
- B1000
- C1700
- D2000
Explanation
The circumference is π·(7/11) = (22/7)(7/11) = 2 m. The wheel must cover 4 km = 4000 m. The number of rounds is 4000/2 = 2000, option D.