BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Car traveled from Town A to Town B...

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 435
Joined: Mon Mar 15, 2010 6:15 am
Thanked: 32 times
Followed by:1 members

by eaakbari » Fri Apr 16, 2010 1:11 pm
There is a handy formula for such questions.
When the same distance is traveled by 2 different speeds , say x and y

avg speed for trip = 2xy/(x+y)

In our case we know y = v and avg speed is 5v/3

5v/3 = 2xv/(x+v)

Solving
x = 5v

Hence C
Whether you think you can or can't, you're right.
- Henry Ford
Top
Master | Next Rank: 500 Posts
Posts: 266
Joined: Mon Oct 19, 2009 9:46 pm
Thanked: 8 times
GMAT Score:690

by pkw209 » Tue Apr 20, 2010 11:59 am
Fantastic tip. Thanks!
Top
Post new topic Post Reply
• Page 1 of 1