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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