SOLUTION: a train cover a certain distance in one hours, if the speed of the train is increased by 10 km per hour. how long it will take to cover that distance

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Question 803211: a train cover a certain distance in one hours, if the speed of the train is increased by 10 km per hour. how long it will take to cover that distance
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +d+ = the distance in km it covers in 1 hr
Speed = +d%2F1+ kmi/hr
+d+=+r%2At+
+d+=+%28+d%2F1+%2B+10+%29%2At+
+t+=+d+%2F+%28+d+%2B+10+%29+ hrs