Question 95
The radius of a circular wheel is 7/4 m. How many revolutions does the wheel make to cover 22 km?
Solution
r = 7/4 m
s = 22 km = 22000 m
Distance covered in 1 revolution = $$2 \pi r = 2 \times \frac{22}{7} \times \frac{7}{4} $$ = 11 m
Number of revolutions for 22000 m = $$ \frac {22000}{11} $$ = 2000 m
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