GMAT Changed on April 16th - Read about the latest changes here

 It is currently 20 May 2018, 05:01

### GMAT Club Daily Prep

#### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# At a speed of 50 miles per hour, a certain car uses 1 gallon of

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 31 Jul 2017
Posts: 341
Location: Malaysia
WE: Consulting (Energy and Utilities)
Re: At a speed of 50 miles per hour, a certain car uses 1 gallon of [#permalink]

### Show Tags

31 Jan 2018, 20:28
TomB wrote:
At a speed of 50 miles per hour, a certain car uses 1 gallon of gasoline every 30 miles. If the car starts with a full 12 gallon tank of gasoline and travels for 5 hours at 50 miles per hour, the amount of gasoline used would be what fraction of a full tank?

A. 3/25
B. 11/36
C. 7/12
D. 2/3
E. 25/36

I am getting 2/3 .Please explain what am i missing?

Total Distance covered in 5 hours = 250 miles.
1 Gallon consumed every 30 miles. For 250 miles, the total gallon consumbed would be $$\frac{25}{3}$$
Total capacity = 12 Gallon.
Hence, $$25/36$$.
_________________

If my Post helps you in Gaining Knowledge, Help me with KUDOS.. !!

Math Expert
Joined: 02 Sep 2009
Posts: 45180
Re: At a speed of 50 miles per hour, a certain car uses 1 gallon of [#permalink]

### Show Tags

31 Jan 2018, 20:59
1
KUDOS
Expert's post
OCDianaOC wrote:
Bunuel wrote:
At a speed of 50 miles per hour, a certain car uses 1 gallon of gasoline every 30 miles. If the car starts with a full 12 gallon tank of gasoline and travels for 5 hours at 50 miles per hour, the amount of gasoline used would be what fraction of a full tank?

A. 3/25
B. 11/36
C. 7/12
D. 2/3
E. 25/36

In 5 hours at 50 miles per hour car will travel 5*50=250 miles and thus will use 250/30=25/3 gallons of gasoline. Gasoline used/full tank equals to $$\frac{(\frac{25}{3})}{12} =\frac{25}{36}$$.

I solved the problem with the approach below and got the correct answer. Did I just get lucky? Will this not work on another similar problem?

R x T = D
50mph x 5 hrs = 250 miles

12 gallons x 30 miles = 360 miles (since a car gets 1 gallon of gasoline for every 30 miles).

I then just took 250 miles and divided by 360 miles then reduced down to 25/36.

That's also a correct way to solve the problem.
_________________
Re: At a speed of 50 miles per hour, a certain car uses 1 gallon of   [#permalink] 31 Jan 2018, 20:59

Go to page   Previous    1   2   [ 22 posts ]

Display posts from previous: Sort by