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A car travels k kilometers in h hours. How many fewer hours

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VP
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A car travels k kilometers in h hours. How many fewer hours [#permalink] New post 21 Apr 2005, 15:02
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A car travels k kilometers in h hours. How many fewer hours would it take the car to travel the same distance at an average rate of r kilometers per hour?
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 [#permalink] New post 21 Apr 2005, 17:03
weird question but here goes -

first time taken = h1 at speed r1
second time taken = h2 at speed r.

fewer hours taken should be h2-h1 = h1(r1/r-1)
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 [#permalink] New post 22 Apr 2005, 17:36
coolcal wrote:
weird question but here goes -
first time taken = h1 at speed r1
second time taken = h2 at speed r.
fewer hours taken should be h2-h1 = h1(r1/r-1)

:no
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 [#permalink] New post 22 Apr 2005, 19:13
Dist time velocity
1. k t1=h v1
2. k t2 r

time taken is lesser in case 2, so t2<t1

difference in time = t1-t2 = h- (k/r)
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ash
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 [#permalink] New post 22 Apr 2005, 19:27
ashkg wrote:
Dist time velocity
1. k t1=h v1
2. k t2 r
time taken is lesser in case 2, so t2<t1 difference in time = t1-t2 = h- (k/r)


absolutly correct...........................
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 [#permalink] New post 25 Apr 2005, 09:58
étudiant wrote:
thearch wrote:
time 2 is k/r


I'll take not of this next time.


mmmm...you will not take this or you will take note of this?
  [#permalink] 25 Apr 2005, 09:58
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