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.
Choose the correct option:
A) 25 km/h B) 40 km/h C) 45 km/h D) 36.5 km/h E) None of these
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   25 km/hnswer 25 km/h
<result>A</result>
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.