GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 14 Dec 2019, 22:29

### 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

# Chloe drove to her friend's house at an average speed of 60 miles per

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 59725
Chloe drove to her friend's house at an average speed of 60 miles per  [#permalink]

### Show Tags

09 May 2017, 03:05
00:00

Difficulty:

55% (hard)

Question Stats:

64% (01:38) correct 36% (01:50) wrong based on 220 sessions

### HideShow timer Statistics

Chloe drove to her friend's house at an average speed of 60 miles per hour. She returned by the same route at an average speed of 45 miles per hour. What was the distance to her friend's house and back?

(1) Chloe stopped for 12 minutes on the way to her friend's house for gasoline and candy.
(2) The trip took one hour longer on the way home than on the way there.

_________________
Senior PS Moderator
Joined: 26 Feb 2016
Posts: 3305
Location: India
GPA: 3.12
Chloe drove to her friend's house at an average speed of 60 miles per  [#permalink]

### Show Tags

09 May 2017, 04:15
1
2
From the question stem, we have the Chloe's average speed to(60 miles/hour) and from(45 miles/hour) her friends house.
We have been asked to find out the distance between her home and her friends house.

(1) Chloe stopped for 12 minutes on the way to her friend's house for gasoline and candy.
Knowing how much time Chloe stopped at her friends house is not enough to determine the distance.
Hence, insufficient.

(2) The trip took one hour longer on the way home than on the way there.
If the distance traveled(one way) is x
$$\frac{x}{45} - \frac{x}{60} = 1$$
Using this information we can find the distance. Clearly sufficient. (Option B)
_________________
You've got what it takes, but it will take everything you've got
Senior Manager
Joined: 21 Mar 2016
Posts: 494
Re: Chloe drove to her friend's house at an average speed of 60 miles per  [#permalink]

### Show Tags

09 May 2017, 11:40
1
stat1: not suff,,, no inof about speed can be deduced....

stat2: difference between time is given...
can be caluclated,,, suff

ans B
Intern
Joined: 30 May 2017
Posts: 8
Re: Chloe drove to her friend's house at an average speed of 60 miles per  [#permalink]

### Show Tags

11 Jul 2017, 16:53
Given data,
Speed on the way there: 60 mph
Speed on the way back: 45 mph

Looking for:
What was total distance?

Statement 1: No other details given other than one stop; insufficient.
Statement 2:

It took 1 hour longer on the way back than there so...

60*t= 45*(t+1)
60t=45t+45
15t=45
t=3

d= r*t
d= 60*3= 180 miles

Sufficient.
Current Student
Status: Chasing my MBB Dream!
Joined: 29 Aug 2012
Posts: 1097
Location: United States (DC)
WE: General Management (Aerospace and Defense)
Re: Chloe drove to her friend's house at an average speed of 60 miles per  [#permalink]

### Show Tags

11 Jul 2017, 18:33
Top Contributor
We need to find the distance and we have 2 speed. So we need to find the time taken for the trip or difference in the time for both the trip.

A. Says only one stop. No other information.
B. Says exactly what we wanted. So B is correct.
_________________
Become a GMAT Club Premium member to unlock discounts

MBA, Class of 2020,
Manager
Joined: 04 Oct 2015
Posts: 230
Location: Viet Nam
Concentration: Finance, Economics
GMAT 1: 730 Q51 V36
GPA: 3.56
Re: Chloe drove to her friend's house at an average speed of 60 miles per  [#permalink]

### Show Tags

05 Sep 2017, 17:45
Hi Bunuel !

From the stimulus in statement 2: THE TRIP TOOK... , how can we deduce the amount of time that statement 2 is referring is not comprising time for rest or stop?

Many thanks
_________________
Do not pray for an easy life, pray for the strength to endure a difficult one - Bruce Lee
Math Expert
Joined: 02 Sep 2009
Posts: 59725
Re: Chloe drove to her friend's house at an average speed of 60 miles per  [#permalink]

### Show Tags

05 Sep 2017, 21:31
1
leanhdung wrote:
Hi Bunuel !

From the stimulus in statement 2: THE TRIP TOOK... , how can we deduce the amount of time that statement 2 is referring is not comprising time for rest or stop?

Many thanks

Actually this does not matter. We know the average rates: (average rate) = (total distance)/(total time). (total time) consists of the total time spent to cover that distance, with all the stops and everything.
_________________
Senior Manager
Status: Gathering chakra
Joined: 05 Feb 2018
Posts: 444
Re: Chloe drove to her friend's house at an average speed of 60 miles per  [#permalink]

### Show Tags

05 Apr 2019, 11:30
Given: 60 * x = d
and 45 * y = d
Find: 2d = ?

1) We have 2 variables for time, we can't relate them. The fact that she stopped doesn't give us any additional info.

2) y+1 = x, now we have another equation and can solve.
Re: Chloe drove to her friend's house at an average speed of 60 miles per   [#permalink] 05 Apr 2019, 11:30
Display posts from previous: Sort by