Question

How many times a wheel of radius 28 cm must rotate to go 352 m? (Take $\pi$ = $\frac{22}{7}$)

Answer 1

$r = 28\;cm$

$\text{Circumference}$ = $2\pi r$

= $2\times \frac{22}{7}\times 28$

= $176 \;cm$

$\text{Number of rotations}=\frac{\text{Total distance to be covered}}{\text{Circumference of wheel}}$

= $\frac{352\;m}{176\;cm}$

= $\frac{35200}{176}$

= $200$