state gov UP Police Head Operator (Radio Cadre) Mock Test Quantitative Aptitude Speed Time and Distance Partial Speed
The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 kms in 4 hours, then the speed of the first train is :
1
70 km/hr.
2
75 km/hr.
3
84 km/hr.
4
87.5 km/hr.