SOLUTION: When the speed of a train is increased by 20%it takes 20minutes less to cover the same distance wht is the time taken to cover the same distance with the original speed

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Question 1063336: When the speed of a train is increased by 20%it takes 20minutes less to cover the same distance wht is the time taken to cover the same distance with the original speed
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
When the speed of a train is increased by 20% it takes 20minutes less to cover the same distance what is the time taken to cover the same distance with the original speed.
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Original speed DATA:
rate = r mph ; time = t hrs ; distance = r*t miles
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Modified DATA:
rate = 1.2r mph ; time = t-(1/5) hrs ; distance = 1.2r(t-(1/5)) miles
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Equation:
rt = 1.2rt - 0.24r
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0.2rt-0.24r = 0
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0.2t = 0.24
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Ans:: t = 12 hours
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Cheers,
Stan H.
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