Multiple choice

Two trains are travelling towards each other. The distance between the trains initially is 400 km. After some time they meet at a distance of 150 km from one end. Find the ratio of the speed of the trains.

  1. 2: 5

  2. 3: 5

  3. 4: 7

  4. 7: 3

  5. 3: 7
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B Correct answer
Explanation

When trains travel toward each other, they travel for the same time until meeting. One train covers 150 km, the other covers 400 - 150 = 250 km. Since time is constant, the ratio of speeds equals the ratio of distances: 150:250 = 3:5. The slower train traveled 150 km and the faster traveled 250 km.

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