Average Speed

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shahab03: Senior | Next Rank: 100 Posts; Posts: 50; Joined: Fri Jun 06, 2008 6:19 pm; Thanked: 3 times

by shahab03 » Thu Sep 11, 2008 1:20 pm

Please show how you put the eq. together.. thanks

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Source: Beat The GMAT — Problem Solving | Thu Sep 11, 2008 1:20 pm

rosh26: Master | Next Rank: 500 Posts; Posts: 215; Joined: Mon Apr 21, 2008 8:07 am

by rosh26 » Thu Sep 11, 2008 4:05 pm

30 mph for 30 miles; time = 1 hr

60 mph for 30 miles; time = 1/2 hr

Avg speed: total distance/total time = 60/1.5 = 40

Answer B

What is OA?

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