Let original speed = S km/h
Here, distance to be covered is constant
∴ S × 8 = (S + 5)(20⁄3)
⇒ 8S - 20⁄3S = 100⁄3 ⇒ S = 100⁄4 = 25 km/h
A train does a journey without stoppage in 8 hours, if it had travelled 5 km/h faster, it would have done the journey in 6 hours 40 minutes. Find its original speed.
1) 25 km/h
2) 40 km/h
3) 45 km/h
4) 36.5 km/h
5) None of these