With an average speed of 42 km/h, a train reaches its destination in time. If it moves with an average speed of 14 km/h, it is late by 35 minutes. The length of the journey is:
Answer & explanation
Correct answer: option 1
As per the question,
The ratio of
average speed 42 : 14
3 : 1
Time 1 : 3
( Time is inversely proportional ti Speed )
Difference 2R = 35 minutes
2R = \(\frac{35}{60}\)
1R = \(\frac{7}{24}\)
Now the distance,
Distance = 42 × \(\frac{7}{24}\) = 12.25 km