SSC CHSL 8 Jan 2017 Shift 3 Paper

Speed of Rizvan = 20 km/hr and Ruchitha = 25 km/hr
Since they are moving in opposite direction, ⇒ Relative speed = 20 + 25 = 45 km/hr
Let distance between them = km and time = $\frac{48}{60}=\frac{4}{5}$ hr
⇒ time = distance/speed
⇒ $\frac{\mathit{d}}{45}=\frac{4}{5}$
⇒ $\mathit{d}=\frac{4}{5}\times 45=4\times 9$
⇒ $\mathit{d}=36$ km