The ratio between the speeds of two trains is 7 : 11, if the first train runs 1400 kms. in 20 hours, then the sum of the speed (in km/h) of both the train is:
Answer & explanation
Correct answer: option 2
Speed of first train = \(\frac{1400}{20}\) = 70 km/h
Ist : IInd
7 : 11 = 18
↓ ↓
×10 ×10
↓ ↓
70 180