Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
Solve it the standard way once — then learn the shortcut.
Q · Time, Speed and DistanceMedium · 45s
How many times will a 900 meter long train take to cross a man walking with a speed of 10 km/hr in the direction of the moving train if the speed of the train is 70 km/hr?
TopicTime, Speed and Distance
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
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Final Answer: Option B — 36sec