Question
Download Solution PDFThe ratio between the speeds of two trains is 7: 8: If the second train runs 400 kms in 4 hours, then the speed of first train is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Ratio of speeds of two trains = 7:8
Speed of the second train = 400 km in 4 hours = 400 / 4 = 100 km/h
Formula Used:
If the ratio of speeds of two trains is a:b, then:
Speed of the first train = (Speed of the second train × a) / b
Calculation:
Given ratio = 7:8, Speed of the second train = 100 km/h
Speed of the first train = (100 × 7) / 8
⇒ Speed of the first train = 700 / 8
⇒ Speed of the first train = 87.5 km/h
The speed of the first train is 87.5 km/h.
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