Multiple choice

When Train ‘A’ starts from point ‘X’ towards ‘Y’ and after covering half distance another train ‘B’ starts from point ‘Y’ towards ‘X’ they take, 1 hour 40 minutes more to meet when train ‘B’ starts from point ‘X’ towards ‘Y’ and after covering half distance train ‘A’ starts from point ‘Y’ towards point ‘X’. Point ‘X’ is 360 Km apart from point ‘Y’. Speed of train ‘B’ is 50% more than speed of train ‘A’. How much more/less percentage of difference of speed of train ‘A’ and train ‘B’ to the 72.

  1. 50% less

  2. 75% less

  3. 25% less

  4. can’t be determine

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Given: Distance XY = 360 km, Speed of B = 1.5 × Speed of A. Let Speed of A = v, then Speed of B = 1.5v. Relative speed when moving toward each other = v + 1.5v = 2.5v. The difference from 72 kmph is |1.5v - v| = 0.5v. The percentage difference to 72 depends on v's value. If 72 represents a reference speed, we compare 0.5v to 72 and express as percentage.

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