RRB Paramedical Staff Nurse Model Paper 1

Let speed of swimmer =x km/hr and speed of current = y km/hr
Downstream speed of swimmer $=\left(\mathit{x}+\mathit{y}\right)$ km/hr
Upstream speed of swimmer $=\left(\mathit{x}-\mathit{y}\right)$ km/hr
Downstream distance covered in 5 minutes by swimmer$=\left(\mathit{x}+\mathit{y}\right)\times \frac{5}{10}\mathit{k}\mathit{m}$
Upstream distance covered in 5 minutes by swimmer $=\left(\mathit{x}-\mathit{y}\right)\times \frac{5}{60}\mathit{k}\mathit{m}$
$\frac{\left(\mathit{x}+\mathit{y}\right)}{12}-\frac{\left(\mathit{x}-\mathit{y}\right)}{12}=\frac{100}{1000}$
$\frac{2\mathit{y}}{12}=\frac{100}{1000}$
$\mathit{y}=0.6$ km/hr