Question
A goods train leaves a station at a certain time and at
a fixed speed. After 11 hours, an express train leaves the same station and moves in the same direction at a uniform speed of 144 km/hr, this train catches up the goods train in 7 hours. Find the speed of the goods train.Solution
Let the speed of the goods train be ‘s’ km/hr Distance covered by goods train in 18 hrs = s x 18 km Distance covered by express train in 7 hrs = 7 x 144 km Distance covered by goods train in 18 hrs = Distance covered by express train in 7 hrs So, 18s = 7 × 144 ⇒ 18s = 1008 ⇒ s = 1008/18 = 56 So, Speed of goods train = 56 km/hr
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