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01 Jul 2004, 06:16
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Hi All, those who have taken the GMAT challenge yesterday, you must have encountered the train Problem as a DS problem:
In that we are asked what time will train B overtake train A??
Since B HAS to overtake A cant we assume that B will go in the same direction as A??
In that we are asked what time will train B overtake train A??
Since B HAS to overtake A cant we assume that B will go in the same direction as A??
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01 Jul 2004, 07:36
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I completely agree with you cbrf3! It does not make sense that B will be going ina different direction. You wouldn't see a question like this on the GMAT.
01 Jul 2004, 12:50
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I agree... I didn't even consider the fact that the train could be going in another direction, I just assumed that we could assume so.
But let's say we did know that it was going in the same direction... would there be sufficient info to solve the equation if we use both statements? i.e. if don't actually have an actual time, but we do know that one of their speeds is equal to 5/6 (?) the other's? (can't remember the exact question). Like we had no actual numbers for time and speed, but we did have relationships between the two if we used both statements... is that sufficient? Maybe the variables cancel out?
But let's say we did know that it was going in the same direction... would there be sufficient info to solve the equation if we use both statements? i.e. if don't actually have an actual time, but we do know that one of their speeds is equal to 5/6 (?) the other's? (can't remember the exact question). Like we had no actual numbers for time and speed, but we did have relationships between the two if we used both statements... is that sufficient? Maybe the variables cancel out?
