RRB RPF RPSF SI and CONS Model Papers 6 with solutions

(2) Speed = 14.4 km/h $=14.4\times \frac{5}{18}=4$ m/s
Time taken = 1 minute 28 seconds = 88 seconds
Distance travelled = 4 × 88 = 352 m
Since,
Distance travelled = Circumference of circle
∴ $2\times \frac{22}{7}\times \mathit{r}=352$
$\Rightarrow \mathit{r}=56\mathit{m}$
Area of field $=\frac{22}{7}\times {56}^2$ $=9856$ m${}^2$