The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:

The ratio between the speeds of two trains is 7 : 8. If the second tra

1.	The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:
A.	70 km/hr
B.	75 km/hr
C.	84 km/hr
D.	87.5 km/hr
Answer» E.

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