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# What is the shortest and the most efficient solution

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SVP
Joined: 16 Oct 2003
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What is the shortest and the most efficient solution [#permalink]  18 Jun 2004, 19:15
What is the shortest and the most efficient solution.
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Manager
Joined: 02 Jun 2004
Posts: 154
Location: san jose,ca
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Kudos [?]: 18 [0], given: 0

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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No excuses - Need 750!!!

SVP
Joined: 30 Oct 2003
Posts: 1794
Location: NewJersey USA
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Kudos [?]: 43 [0], given: 0

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
Manager
Joined: 02 Jun 2004
Posts: 154
Location: san jose,ca
Followers: 3

Kudos [?]: 18 [0], given: 0

Nice thinking Anand. Good one.
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GS
No excuses - Need 750!!!

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