Multiple choice

A train moves from station A to station B with uniform speed. Suppose the train takes 4 hours less if its speed is increased by 20 km/hr and takes 6 hours more if it speed is decreased by 20 km/hr to reach the required destination. Find the distance between stations A and B.

  1. 10,000 km

  2. 2600 km

  3. 2400 km

  4. 4400 km

  5. 4600 km
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let distance be D and speed be S. D/S - D/(S+20) = 4 and D/(S-20) - D/S = 6. Solving these equations: D = 2400 km and S = 100 km/hr.

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