Question

The diameter of the whell of a can is $77cm$.How many revolutions will it make to travel $242$km

Answer 1

$Given,$Total distance travel $=$ $242km$ $=$ $242\times$ ${10}^{5}cm$

Diameter of wheel (d) is $77cm.$

The circumference of wheel $=$ $\pi d$

$=77\pi$ cm

No. of revolutions $=$ $\frac{Totaldistancetravel}{circumference}$

$=$ $\frac{242{\times 10}^{5}cm}{77\pi cm}$

$=$ ${10}^5$

$So,$ The no. of revolutions will be ${10}^5$