A bicycle wheel of radius 42cm is rolled over a distance 66 meters. How many revolutions does it make?[Take \(\pi = \frac{22}{7}\)]

  • A 2.5
  • B 5
  • C 25
  • D 50
waec 2000mathematics

The correct answer is C. 25

circumference of the bicycle wheel

\(= 2\pi r = 2 \times \frac{22}{7} \times 42 - 264cm = 2.64m\\\)

Number of revolution

\(=\frac{66}{2.64} = 25\)

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