Question
The "Sunrise" train departs from City A at a specific
time. Four hours later, the "Twilight" train leaves the same station and travels in the same direction at a speed of 120 km/hr. If the "Twilight" train catches up to the "Sunrise" train in 12 hours, what is the speed of the "Sunrise" train?Solution
ATQ, Distance travelled by Twilight in 12 hours = 12 × 120 = 1440 km Speed of Sunrise Train = 1440/(12 + 4) = 1440/16 = 90 km/hr
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