state gov UP Police Assistant Operator (Radio Cadre) Mock Test Quantitative Aptitude Speed Time and Distance Problem on Trains
A 400 metres long train moves with a speed of 72 km/hr and crosses a boundary of a steel factory in 2 minutes. How much time (in seconds) would it take to cross the boundary if the boundary was 500 metres shorter?
1
65 seconds
2
105 seconds
3
95 seconds
4
85 seconds