Question on: WAEC Mathematics - 2000
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
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Correct Option: C
circumference of the bicycle wheel
\(= 2\pi r = 2 \times \frac{22}{7} \times 42 - 264cm = 2.64m\\)
Number of revolution
\(=\frac{66}{2.64} = 25\)
\(= 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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