2010 · Q73
A wheel of a bicycle has inner diameter 50 cm and thickness 10 cm. What is the speed of the bicycle if it makes 10 revolutions in 5 seconds?
Elementary MathematicsMensuration
- A5.5 m/s
- B4.4 m/s
- C3.3 m/s
- D2.2 m/s
Explanation
Outer diameter 70 cm; 2 rev/s × π×0 cm = 4.4 m/s.