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.
@Img@:https://digitalbenchersfiles.s₃.ap-south-1.amazonaws.com/1755002958713Screenshot%202025-08-12%20at%206.19.08%20PM.png :@Img@
Final Answer: Option B - 36sec