Question

a train met with an accident 120 km from station a A train met with an accident 120 km from station A. It completed the remaining journey at 5/6 of its previous speed and reached 2 hours late at station B. Had the accident taken place 300 km further, it would have been only 1 hour late?
What is the speed of the train?​

Answer 1

Speed of the train is 60km/hr

Step-by-step explanation:

If speed becomes $\frac{5}{6}$   then time taken will be $\frac{6}{5}$ of original time.

As S=$\frac{D}{T}$ thus speed is inversely proportional to time.

Thus, extra time = 2 hour

Thus equating the equation according to the question we get,

$\frac{1}{5}$= 2 hour    

Thus unusual time which is require to complete the journey = 5 $\times$ 2 = 10 hours.

It means It covers 300 km distance in 5 hours.

then speed = $\frac{300}{5}$ km/hr

= 60 km/hr

Speed of the train is 60km/hr