Summer is Coming! Join the Game of Timers Competition to Win Epic Prizes. Registration is Open. Game starts Mon July 1st.

 It is currently 18 Jul 2019, 02:16

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

Larissa and Steve each drove the same distance from City X to City Y

Author Message
TAGS:

Hide Tags

Manager
Joined: 26 Feb 2015
Posts: 112
Larissa and Steve each drove the same distance from City X to City Y  [#permalink]

Show Tags

12 Jun 2015, 23:25
1
5
00:00

Difficulty:

5% (low)

Question Stats:

84% (00:49) correct 16% (01:07) wrong based on 378 sessions

HideShow timer Statistics

Larissa and Steve each drove the same distance from City X to City Y in separate cars. Did it take longer for Larissa than for Steve to complete this trip?

(1) On this trip, Larissa's average speed was 80 kilometers per hour and Steve's average speed was 85 kilometers per hour

(2) On this trip, Larissa and Steve each drove 68 kilometers

See spoiler for my question
OA is A, but can this question actually be answered? Nowhere is it mentioned that they kept a constant speed. Let's say the distance was 80 and Larissa kept a constant speed of 80kph. She would spend 1 hour driving, but if Steve spent the first 79 km driving 1 kph and then the remaining 1 km at 6799 kph, thus keeping his average speed at 85kph but he would clearly spend more time driving? If however, Steve also kept a constant speed of 85kph, he would definitely complete the distance in shorter time
CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2959
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Re: Larissa and Steve each drove the same distance from City X to City Y  [#permalink]

Show Tags

13 Jun 2015, 01:19
1
erikvm wrote:
Larissa and Steve each drove the same distance from City X to City Y in separate cars. Did it take longer for Larissa than for Steve to complete this trip?

(1) On this trip, Larissa's average speed was 80 kilometers per hour and Steve's average speed was 85 kilometers per hour

(2) On this trip, Larissa and Steve each drove 68 kilometers

See spoiler for my question
OA is A, but can this question actually be answered? Nowhere is it mentioned that they kept a constant speed. Let's say the distance was 80 and Larissa kept a constant speed of 80kph. She would spend 1 hour driving, but if Steve spent the first 79 km driving 1 kph and then the remaining 1 km at 6799 kph, thus keeping his average speed at 85kph but he would clearly spend more time driving? If however, Steve also kept a constant speed of 85kph, he would definitely complete the distance in shorter time

Hi erikvm,

In statement 1, it's mentioned that On this trip, Larissa's average speed was 80 kilometers per hour and Steve's average speed was 85 kilometers per hour which should be interpreted that whether they had constant speed or variable speed at every moment during their travel, finally they have been able to manage the average speeds of 80 and 85 Km/Hr.

Please Note: You may drive from your home to office at 10 Km/hr and office to home at 20 km/h at constant speed but the average speed of the entire journey will be 40/3 km/hr whereas you have never driven at 40/3 km/h at any point of time in your journey. So average speed is the reflection of Total Distance travelled and total time taken

Average Speed = Total Distance / Total Time

i.e. Total Time = Total Distance / Average Speed

i.e. If distance travelled by two riders are equal then Ratio of Time will be reciprocal of ratio of their respective Average Speeds

_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2959
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Larissa and Steve each drove the same distance from City X to City Y  [#permalink]

Show Tags

13 Jun 2015, 01:23
2
erikvm wrote:
Larissa and Steve each drove the same distance from City X to City Y in separate cars. Did it take longer for Larissa than for Steve to complete this trip?

(1) On this trip, Larissa's average speed was 80 kilometers per hour and Steve's average speed was 85 kilometers per hour

(2) On this trip, Larissa and Steve each drove 68 kilometers

See spoiler for my question
OA is A, but can this question actually be answered? Nowhere is it mentioned that they kept a constant speed. Let's say the distance was 80 and Larissa kept a constant speed of 80kph. She would spend 1 hour driving, but if Steve spent the first 79 km driving 1 kph and then the remaining 1 km at 6799 kph, thus keeping his average speed at 85kph but he would clearly spend more time driving? If however, Steve also kept a constant speed of 85kph, he would definitely complete the distance in shorter time

The Highlighted example that you have quoted is INCORRECT

Here is the explanation of your example which renders the average speed of 1.013 and not 85 kmph
Attachments

File comment: www.GMATinsight.com

125.jpg [ 60.72 KiB | Viewed 3927 times ]

_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
SVP
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1686
Location: India
GPA: 3.01
WE: Engineering (Real Estate)
Larissa and Steve each drove the same distance from City X to City Y  [#permalink]

Show Tags

27 Mar 2018, 04:15
erikvm wrote:
Larissa and Steve each drove the same distance from City X to City Y in separate cars. Did it take longer for Larissa than for Steve to complete this trip?

(1) On this trip, Larissa's average speed was 80 kilometers per hour and Steve's average speed was 85 kilometers per hour

(2) On this trip, Larissa and Steve each drove 68 kilometers

See spoiler for my question
OA is A, but can this question actually be answered? Nowhere is it mentioned that they kept a constant speed. Let's say the distance was 80 and Larissa kept a constant speed of 80kph. She would spend 1 hour driving, but if Steve spent the first 79 km driving 1 kph and then the remaining 1 km at 6799 kph, thus keeping his average speed at 85kph but he would clearly spend more time driving? If however, Steve also kept a constant speed of 85kph, he would definitely complete the distance in shorter time

Given: Distance is equal for both Larissa and Steve from city X to City Y.

St 1: Average speed of Larissa = 80 kms per hr
Average speed of Steve = 85 kms per hr

As the distance is same we can say that Time taken by Larissa is more than time taken by Steve to complete the trip. Sufficient

St 2: Distance = 68 kms

We don't know the speed. Insufficient

(A)
_________________
"Do not watch clock; Do what it does. KEEP GOING."
Larissa and Steve each drove the same distance from City X to City Y   [#permalink] 27 Mar 2018, 04:15
Display posts from previous: Sort by