SOLUTION: When travelling at (x-5) km/h, a train takes 2x hours to travel 12km. Find the speed of the train.
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Question 1118152: When travelling at (x-5) km/h, a train takes 2x hours to travel 12km. Find the speed of the train.
Found 2 solutions by josgarithmetic, greenestamps:
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
RT=D for R rate, T time, D distance.
Your example uses R=x-5, and T=2x, and D=12.
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Speed was kilometer per hour.
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check:
recall, x=6.
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(speed given as x-5;
which is evaluated as 1 )
Answer by greenestamps(13198) (Show Source): You can put this solution on YOUR website!
Distance = rate times time:
(note this is equivalent to taking the given information, that the train travels 12 km in 2x hours, and by simple logic changing it to having the train travel 6 km in x hours)
The train's speed is either 6 km/hr or -1 km/hr; I think we can rule out the negative speed....
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