Question
A goods train leaves a station at a certain time and at a fixed speed. After 6 hours, an express train leaves the same station and moves in he same direction at a uniform speed of 90 kmph. This train catches up the goods train in 4 hours. Find the speed of the goods train .
Answer: Option C
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Let the speed of the goods train be `x` kmph.
Distance covered by goods train in 10 hours.
= Distance covered by express train in 4 hours
`:.` `10x` = 4 x 90 or `x` = 36
So, speed of goods train = 36 kmph.
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