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Question
A train passes without stopping, through stations A, B, C, D and E (in order). The distance between any two stations is same. It is also known that the train runs only on two constant speeds changing its speed only at stations. If it crosses A, C and E at 12 pm, 3 pm and 5 pm respectively, then it can be inferred that the train crosses.
A train passes without stopping, through stations A, B, C, D and E (in order). The distance between any two stations is same. It is also known that the train runs only on two constant speeds changing its speed only at stations. If it crosses A, C and E at 12 pm, 3 pm and 5 pm respectively, then it can be inferred that the train crosses.
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Solution
The correct option is D Either (a) or (b)
The time taken by the train between any two adjacent stations can have only two values. So, it must cross one of the intermediate stations exactly between that of the neighbouring stations. So, the train should either cross B at 1:30 pm or D at 4 pm
Either (a) or (b)
The time taken by the train between any two adjacent stations can have only two values. So, it must cross one of the intermediate stations exactly between that of the neighbouring stations. So, the train should either cross B at 1:30 pm or D at 4 pm
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