The ratio between the speeds of two trains is 7 : 10. If the second train runs 400 kms in 8 hours, then the speed of the first train is
Select:
A) 35 km/h
B) 60 km/h
C) 45 km/h
D) 50km/h
E) 30 km/h
35 km/h   35 km/h
<result>A</result>
The ratio between the speeds of two trains is 7 : 10. If the second train runs 400 kms in 8 hours, then the speed of the first train is