Question 108

If the radius of a circular wheel is 14 cm. then the number of revolutions necessary to cover a distance of 105.6 meters is ( Here take $$\pi = \frac{22}{7}$$)

Solution

Radius of the circular wheel = 14 cm

Circumference of the circular wheel = $$2\times\pi\times14$$ = $$2\times\frac{22}{7}\times14$$ = 88 cm

$$\therefore\ $$The number of revolutions required to cover a distance of 105.6 m = $$\frac{\text{Distance}}{\text{Circumference of the wheel}}$$

$$=\frac{105.6\times100}{88}$$

$$=120$$

Hence, the correct answer is Option A

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