SSC CHSL 15 Nov 2015 Shift 2 Paper

Speed of train A = 75 km/hr and speed of train B = 50 km/hr
Let distance travelled by train B = d km
⇒ Distance travelled by train A = ( d + 175 ) km
Time taken by both the trains is equal as they start at the same time.
Using, time = distance/speed
⇒ $\frac{\mathit{d}+175}{75}=\frac{\mathit{d}}{50}$
⇒$\frac{\mathit{d}+175}{3}=\frac{\mathit{d}}{2}$
⇒ $2\mathit{d}+350=3\mathit{d}$
⇒ $3\mathit{d}-2\mathit{d}=\mathit{d}=350$
∴ between A and B = $\mathit{d}+\left(\mathit{d}+175\right)=2\mathit{d}+175$
= $2\left(350\right)+175=700+175=875$ km