A train can cover a certain distance in 3 hrs. If the track management is improved, an increase in the speed of the train by 10 km/h is possible, which can reduce the above journey time by 30 minutes. Find the initial speed of the train.
Answer & explanation
Correct answer: option 3
Ratio of , Initial : Final
Time 3 : 2.5
Time 6 : 5
Speed 5 : 6
( Speed is inversely proportional to Time)
According to question ,
( 6 - 5 )R = 10 km/h
1R = 10 km/h
5R = 5 × 10 = 50 km/h
So , Initial Speed is 50 km/h