The ratio between the speeds of two trains is 2 : 7. If the first train runs 350 km in 2 hours, then the sum of the speeds (in km/h) of both the trains is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 787.5.
Sum of the ratio of the speed of train = 2 + 7 = 9
Speed of first train = 350/2 = 175 Kmph
Sum of the speed of the train = 9/2 × 175 = 787.5 km/h