search
Q: The ratio between the speeds of two trains is 7:5. If the second train runs 400 km in 4 h, then the speed of the first train is:
  • A. 142 km/h
  • B. 145 km/h
  • C. 148 km/h
  • D. 140 km/h
Correct Answer: Option D -
answer image

Explanations:

explanation image