Algebra

Expert replies

2sun3: Junior | Next Rank: 30 Posts; Posts: 11; Joined: Mon Jul 07, 2008 6:53 am

by 2sun3 » Wed Jul 30, 2008 7:24 am

If A travels 3 miles per hour, and B travels 1/3 faster than or greater than A. What is the B's miles per hour? I know the answer but could anyone explain the math behind the answer, which is 4?

Thanks

Last edited by 2sun3 on Wed Jul 30, 2008 12:30 pm, edited 1 time in total.

Like this post

Source: Beat The GMAT — Problem Solving | Wed Jul 30, 2008 7:24 am

sudhir3127: Legendary Member; Posts: 829; Joined: Mon Jul 07, 2008 10:09 pmFollowed by: 3 members; Location: INDIA; Thanked: 84 times

by sudhir3127 » Wed Jul 30, 2008 7:29 am

B = 4/3 A (1/3 faster is 4/3)
= 4/3*3= 4

hope its clear...

Like this post

2sun3: Junior | Next Rank: 30 Posts; Posts: 11; Joined: Mon Jul 07, 2008 6:53 am

Thanks Sudhir

by 2sun3 » Wed Jul 30, 2008 7:45 am

Thanks sudhir can you help me understand it by writing the explanation.
That'll be great.

Like this post

preetha_85: Senior | Next Rank: 100 Posts; Posts: 95; Joined: Sun Jul 06, 2008 6:41 am; Location: INDIA; Thanked: 2 times

by preetha_85 » Wed Jul 30, 2008 10:48 am

Hi ..

Assume A travels at xkm/hr....
B travels 1/3rd faster than A i.e (As spped + (1/3)As speed )
=4/3(As speed)
=(4/3)*3 =4

Hope this clear..

Like this post

2sun3: Junior | Next Rank: 30 Posts; Posts: 11; Joined: Mon Jul 07, 2008 6:53 am

Thanks Preetha

by 2sun3 » Wed Jul 30, 2008 12:56 pm

How did you get 4/3 as A's speed? Can you explain?

Thanks

Like this post

parallel_chase: Legendary Member; Posts: 1153; Joined: Wed Jun 20, 2007 6:21 amFollowed by: 2 members; Thanked: 146 times

Re: Thanks Preetha

by parallel_chase » Wed Jul 30, 2008 12:59 pm

2sun3 wrote:How did you get 4/3 as A's speed? Can you explain?

Thanks

4/3 is not A's speed, its (4/3)*A's speed

if A's speed is 3 miles/hr, and B's speed is 1/3 faster than A's speed.

Then B's speed is (1+1/3) of A's speed

4/3 * (A's speed) = 4 miles/hr

Hope its clear.

Like this post

2sun3: Junior | Next Rank: 30 Posts; Posts: 11; Joined: Mon Jul 07, 2008 6:53 am

Thanks guys

by 2sun3 » Thu Jul 31, 2008 6:37 am

Thanks guys for your help.

I'll just want to recap on it to see if i understood it correctly.

If A's speed is 3 miles per hour and B's speed is 1/3 greater than A.
Then assuming if A's speed was 1 Then B's speed would be 1+1/3 = 4/3
But for A's speed=3 then B's speed would be 4/3*3 = 4.

Is that right?

Like this post

sudhir3127: Legendary Member; Posts: 829; Joined: Mon Jul 07, 2008 10:09 pmFollowed by: 3 members; Location: INDIA; Thanked: 84 times

by sudhir3127 » Thu Jul 31, 2008 6:40 am

Ur right...!!!

i am glad we all were a help to you...

thanks parallel !!

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

560 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review