The ratio of the speeds of two trains is 2 : 7. If the first train runs 250 km in 5 hours, then the sum of the speeds (in km/h) of both the trains is:

225

Ratio of speed of !st and 2nd train = 2 : 7

Speed of 1st train = \(\frac{250}{5}\) = 50 km/h

According to question ,

2R = 50

1R = 25

Now , Sum to speed of both the trains = 2R + 7R = 9R

9R = 9 × 25 = 225 km/h