Two trains start at the same time from two stations and proceed toward each other at the speed of 40 km/h and 45 km/h, respectively. When they meet, it is found that one train has travelled 20 km more than the other. Find the distance between the two stations.

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  1. 390 km
  2. 400 km
  3. 395 km
  4. 340 km

Answer (Detailed Solution Below)

Option 4 : 340 km
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Detailed Solution

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Given:

Speed of train 1 = 40 km/h,

Speed of train 2 = 45 km/h,

Difference in distance = 20 km

Concept:

Relative speed when moving towards each other = Speed1 + Speed2,

Time = Distance/Speed

Calculation:

⇒ Time taken to meet = Difference in distance/Difference in speeds = 20 km/5 km/h = 4 hours

⇒ Distance between the stations = (Speed of train 1 + Speed of train 2) × Time = (40 + 45) km/h × 4 hours = 340 km

Hence, the distance between the two stations is 340 km.

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