Question

THE DIAMETER OF A WHEEL IS 1.26 M. HOW FAR IT WILL TRAVEL IN 500 REVOLUTIONS?

Answer 1

Diameter of wheel, d = 1.26 m
radius of wheel, r = 0.63 m

$\mathrm{distance}\mathrm{covered}\mathrm{in}1\mathrm{revolution}=\mathrm{circumference}=2\mathrm{\pi r}=2\times \frac{22}{7}\times 0.63=3.96\mathrm{m}$
distance covered in 500 revolutions = 3.96 $\times$ 500 = 396 $\times$ 5 = 1980 m = 1.98 km