a train covers a distance of 300km at a constant speed .if the speed of the train is increased by 5km/hr the journey would have taken 2 hour less.find the original speed of train?

:confused:

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- Aug 18th 2006, 01:01 AManjanaquadratic equations
a train covers a distance of 300km at a constant speed .if the speed of the train is increased by 5km/hr the journey would have taken 2 hour less.find the original speed of train?

:confused: - Aug 18th 2006, 01:12 AMCaptainBlackQuote:

Originally Posted by**anjana**

,

similarly at the higher speed it would take:

.

But we are told , so:

which we can rearrange to:

Which has two solutions and you need the poitive one.

RonL