state gov TNPSC Group 4 (தமிழ்நாடு குழு IV) Mock Test 2025 Quantitative Aptitude Speed Time and Distance
A train passes over a 400 metre long bridge. If the speed of the train is 30 m/s and the train takes 20 seconds to cross the bridge, the length of the train in metres is
1
200
2
400
3
600
4
800