state gov WBPSC Food SI Mock Test 2023 Quantitative Aptitude Speed Time and Distance Problem on Trains
A 400 m long train takes 36 sec. to cross a man walking at 20 km/hr in the direction opposite to that of the train. What is the speed of the train?
1
20 km/hr
2
30 km/hr
3
15 km/hr
4
11 km/hr