Question

The diameter of the wheel of a cycle is 70 cm. How far will it go in 250 revolutions?

Answer 1

It may be noted that in one revolution, the cycle covers a distance equal to the circumference of the wheel.
Diameter of the wheel = 70 cm
∴ Circumference of the wheel = $\mathrm{\pi d}$ = $\left(\frac{22}{7}\times 70\right)$ cm = 220 cm
Thus, the cycle covers 220 cm in one revolution.

∴ Distance covered by the cycle in 250 revolutions = (220 × 250) cm
= 55000 cm
= 550 m [since 1 m = 100 cm]

Hence, the cycle will cover 550 m in 250 revolutions.