Question

A train travels a distance of 300 km at a constant speed. If the speed of the train is increased by 5 km an hour the journey would have taken 2 h less. The original speed of the train was

• A. 25 km/hr
• B. 28 km/hr
• C. 20 km/hr
• D. 30 km/hr

Answer 1

The Correct Option is A

Let the normal speed of train \(=x\) km/hr
Let the normal time of train \(=T\) hours
\(\frac{300}{x}=T\)                 (i)

\(\frac{300}{x+5}=T-2\)        (ii)

Solving equations (i) and (ii), we get
\(x=25,-30\) (not possible)
\(\therefore\) Speed of train \(=25km/hr\)
The correct option is (A)