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What is the shortest and the most efficient solution

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SVP
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What is the shortest and the most efficient solution [#permalink] New post 18 Jun 2004, 19:15
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What is the shortest and the most efficient solution.
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Manager
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Joined: 02 Jun 2004
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 [#permalink] New post 18 Jun 2004, 23:41
D.
diff1 = (v+5)(t+1)-vt=70 => 5t+v=65

diff2 = (v+10)(t+2)-vt=10t+2v+20= 130+20=150
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SVP
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 [#permalink] New post 19 Jun 2004, 04:31
5 mph more for 1 hour he covers 70 miles
So he must be driving at 65 mph
Now he drives 10 mphs per hor more for 2 hours
2*(65+10) = 150
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 [#permalink] New post 19 Jun 2004, 15:15
Nice thinking Anand. Good one.
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  [#permalink] 19 Jun 2004, 15:15
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What is the shortest and the most efficient solution

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