SSC CPO SI and ASI Model Paper 1

(3) The distance covered by thewheel in 1 minute
$=\frac{120\times 1000\times 100}{60}$
=200000 cm
The distance covered by the wheelin one revolution = 2π r (r = radius)
$=2\times \frac{22}{7}\times \frac{210}{2}660\mathit{c}\mathit{m}$
Therefore the number of revolutionsthat the wheel should make
$=\frac{200000}{660}=303$