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The wheel of a tractor has a diameter 1 4m What... - WAEC Mathematics 2006 Question

The wheel of a tractor has a diameter 1.4m. What distance does it cover in 100 complete revolutions? [Take \(\pi = \frac{22}{7}\)]
A
140m
B
220m
C
280m
D
440m
correct option: d

radius = (\frac{diameter}{2}) = (\frac{1.4}{2})

= 0.7m

circumference = 2(\pi r = 2 \times \frac{22}{7} \times 0.7m = 4.4m)

distance covered = 4.4m x 100 = 440m

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