railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Speed Time and Distance Relative Speed
Train P crosses train Q completely in 45 seconds, while running in opposite directions. The lengths of train P and train Q are 1200 metres and 1500 metres, respectively. The speed of train Q is 144 km/h. In how much time can train P cross an 1800-metre long platform?
1
180 seconds
2
175 seconds
3
120 seconds
4
150 seconds