Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

From A to B, 20 miles per gallon of gas; from B to A, [#permalink]
04 Mar 2008, 09:25

00:00

A

B

C

D

E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct
0% (00:00) wrong based on 0 sessions

From A to B, 20 miles per gallon of gas; from B to A, different route, 25 miles per gallon of gas. What is the average gas per mile for the round trip? (1) round trip is 175 miles long. (2) from B to A the distance is 3/4 of distance from A to B.

Please kindly provide explanations for the following question

From A to B, 20 miles per gallon of gas; from B to A, different route, 25 miles per gallon of gas. What is the average gas per mile for the round trip? (1) round trip is 175 miles long. (2) from B to A the distance is 3/4 of distance from A to B.

Please kindly provide explanations for the following question

Is it C .. ?? I guess it is ..

St1 : Only the total distance. We need total distance and the total fuel consumed.. ---- Insuff.

St2 : AB = x, BA = 3/4x .. That's it what we get from this statement. --- Insuff.

St1 &2 , x+3/4x = 175

AB = 100, BA = 75 and the rest all taken care of .. Suff..

To find average gas/mile we need total miles and total gas consumed we already have averages for individual trips AB : 20 miles/gallon BA : 25 miles/gallon

Statement 1 : Gives total mile but no info on total gas insuff. statement 2 : Gives relation between miles not much info to find required average Both together : Let AB=x BA=y so y=3/4x x+y=175 we have independent averages so we can find total from this info.

From A to B, 20 miles per gallon of gas; from B to A, different route, 25 miles per gallon of gas. What is the average gas per mile for the round trip? (1) round trip is 175 miles long. (2) from B to A the distance is 3/4 of distance from A to B.

Please kindly provide explanations for the following question

Must be C. this was my initial answer in the begining. However, being a GMAT problem I double checked S2.

Just use the miles from S1: 175. we get AB=100 and BA=75.

Use another one 140 miles. we get AB=80 and BA=60.

Stmt2: let's say the AB = s BA = 3/4 s Average gas per mile for the round trip = total miles/total gas consumed total miles = s + 3/4 s total gas = s/20 + 3/4 s/25 we can calculate the average gas per mile from the give info as 's' will cancel out from numerator and denominator. hence suff

Stmt2: let's say the AB = s BA = 3/4 s Average gas per mile for the round trip = total miles/total gas consumed total miles = s + 3/4 s total gas = s/20 + 3/4 s/25 we can calculate the average gas per mile from the give info as 's' will cancel out from numerator and denominator. hence suff

I did C but vshaunak’s answer sounds intriguing. What is the OA?

From A to B, 20 miles per gallon of gas; from B to A, different route, 25 miles per gallon of gas. What is the average gas per mile for the round trip? (1) round trip is 175 miles long. (2) from B to A the distance is 3/4 of distance from A to B.

Please kindly provide explanations for the following question

average gas per mile for the round trip = Tot distance/Tot nos of gallons of gas used

1.gives distance but does not get info about amount of gas consumed ->INSUFF 2. let d be dist between A nd B 20 = d/g1 , 25 = .75 d/g2

g1 = d/20, g2 = .75d/25

Tot distance = 1.75d

Tot nos of gallons of gas used = g1+g2 =d/20+ .75d/25

From A to B, 20 miles per gallon of gas; from B to A, different route, 25 miles per gallon of gas. What is the average gas per mile for the round trip? (1) round trip is 175 miles long. (2) from B to A the distance is 3/4 of distance from A to B.

Average gas per mile = (volume of gas from A to B + volume of gas from B to A)/(distance from A to B + distance from B to A). (1) is insuff. (2) let the distantce from A to B as d1, then d1/20 gallon of gas; let the distantce from B to A as d2, d2= 3d1/4/25=3d1/100 gallon of gas. The average is (d1/20+3d1/100)/(d1+3d1/4)=8/175. SUFF

I couldn’t help myself but stay impressed. young leader who can now basically speak Chinese and handle things alone (I’m Korean Canadian by the way, so...