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
A train leaves Delhi at 6 : 00 (a)M. and expects to reach a place 400 km away from Delhi at 2 : 00 PM. At 12 noon he found he had covered only 60% of the distance. By how much does he have to increase the speed to reach at 2 PM?
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/1755002894291Screenshot%202025-08-12%20at%206.18.04%20PM.png :@Img@
Final Answer: Option B — 60 km/hr