NEW HERE? LEARN MORE
closeclose
Last visit was: 25 Apr 2024, 20:41 It is currently 25 Apr 2024, 20:41
Decision Tracker
My Rewards
New posts
New comers' posts

Close
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
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

Every day, Tom walks from his home to his office, via the same route,

SORT BY:
Date
Kudos
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
L
siddharthkapoor
GMAT Club Reviews PM Intern
Joined: 10 Apr 2018
Posts: 532
Own Kudos [?]: 754 [6]
Given Kudos: 522
Location: India
Schools: ISB'22 (D)
GMAT 1: 680 Q48 V34
GPA: 3.3
Send PM
Reviews Badge
Every day, Tom walks from his home to his office, via the same route, [#permalink] New post   12 Oct 2019, 06:42
1
Kudos
5
Bookmarks
00:00
A
B
C
D
E

Difficulty:

65% (hard)

Question Stats:

62% (02:40) correct 38% (02:28) wrong based on 220 sessions
Hide Show timer Statistics
Every day, Tom walks from his home to his office, via the same route, covering s feet at a speed of x feet per minute. Today he took a different route and ended up walking 10% more than he usually does, at a speed of x meters per minute. What is the percentage change in the time he took today compared to the time he takes on a usual day? (1 feet = 0.3 meter)

A. 10% decrease

B. 10% increase

C. 67% decrease

D. 67% increase

E. 200% decrease
ShowHide Answer
Official Answer
C
Most Helpful Reply
User avatar
L
chetan2u
RC & DI Moderator
Joined: 02 Aug 2009
Status:Math and DI Expert
Posts: 11178
Own Kudos [?]: 31933 [5]
Given Kudos: 290
Send PM
Reviews Badge
Every day, Tom walks from his home to his office, via the same route, [#permalink] New post   12 Oct 2019, 19:29
2
Kudos
3
Bookmarks
Expert Reply
iamsiddharthkapoor wrote:
Every day, Tom walks from his home to his office, via the same route, covering s feet at a speed of x feet per minute. Today he took a different route and ended up walking 10% more than he usually does, at a speed of x meters per minute. What is the percentage change in the time he took today compared to the time he takes on a usual day? (1 feet = 0.3 meter)

A. 10% decrease

B. 10% increase

C. 67% decrease

D. 67% increase

E. 200% decrease


(I) Substitute values for variables..
Let s = 100 and x=10..
Time taken while going 100 at 10 feet per minute= \(\frac{100}{10}=10\) minutes
Time taken on return 1.1*100 at 10 meter per minute or @\(\frac{10}{0.3}\) feet per minute= \(110/\frac{10}{0.3}=\frac{33}{10}=3.3\) minutes

Change or decrease = \(\frac{10-3.3}{10}*100=67\)%

(II) Algebra..
Time taken while going s feet at x feet per minute= \(\frac{s}{x}\) minutes
Time taken on return 1.1*s at x meter per minute or @\(\frac{x}{0.3}\) feet per minute= \(1.1s/\frac{x}{0.3}=\frac{0.33s}{x}\) minutes

Change or decrease = \((\frac{s}{x}-\frac{0.33s}{x})/\frac{s}{x}*100=(1-0.33)*100=67\)%

C
General Discussion
User avatar
L
CrackverbalGMAT
GMAT Club Legend
GMAT Club Legend
Joined: 03 Oct 2013
Affiliations: CrackVerbal
Posts: 4946
Own Kudos [?]: 7627 [2]
Given Kudos: 215
Location: India
Send PM
Re: Every day, Tom walks from his home to his office, via the same route, [#permalink] New post   01 Dec 2020, 20:34
2
Kudos
Top Contributor
Tigi75 wrote:
"Tom ended up walking 10% more" could refer to time or distance, as it is new route...



It says walking 10% more than he usually does, and hence it refers to distance.

If it was, taking 10% more than he usually does, then would have referred to time. (In which case the answer would simply have been 10% increase)

Hope this helps

Arun Kumar
User avatar
L
Archit3110
GMAT Club Legend
GMAT Club Legend
Joined: 18 Aug 2017
Status:You learn more from failure than from success.
Posts: 8019
Own Kudos [?]: 4098 [0]
Given Kudos: 242
Location: India
Concentration: Sustainability, Marketing
GMAT Focus 1:
545 Q79 V79 DI73
GPA: 4
WE:Marketing (Energy and Utilities)
Send PM
GMAT ToolKit User CAT Tests
Re: Every day, Tom walks from his home to his office, via the same route, [#permalink] New post   13 Oct 2019, 05:29
let distance s feet = 10feet = 3 mtr
speed = 10 feet per minute ; total time ; 3/10 ; .3 min
new distance ; 3*1.1 ; 3.3 mtrs
speed ; 10/.3 feet per min; time taken ; 3.3/33.33 = .099 min
% ∆ in time = .099-.3/.3 ; (67%)

IMO C


iamsiddharthkapoor wrote:
Every day, Tom walks from his home to his office, via the same route, covering s feet at a speed of x feet per minute. Today he took a different route and ended up walking 10% more than he usually does, at a speed of x meters per minute. What is the percentage change in the time he took today compared to the time he takes on a usual day? (1 feet = 0.3 meter)

A. 10% decrease

B. 10% increase

C. 67% decrease

D. 67% increase

E. 200% decrease
avatar
B
Tigi75
Intern
Intern
Joined: 25 Jul 2020
Posts: 2
Own Kudos [?]: 2 [0]
Given Kudos: 1
Send PM
Re: Every day, Tom walks from his home to his office, via the same route, [#permalink] New post   01 Dec 2020, 20:10
"Tom ended up walking 10% more" could refer to time or distance, as it is new route...
User avatar
P
JeffTargetTestPrep
Target Test Prep Representative
Joined: 04 Mar 2011
Status:Head GMAT Instructor
Affiliations: Target Test Prep
Posts: 3043
Own Kudos [?]: 6275 [0]
Given Kudos: 1646
Send PM
Re: Every day, Tom walks from his home to his office, via the same route, [#permalink] New post   24 Jul 2023, 04:08
Expert Reply
siddharthkapoor wrote:
Every day, Tom walks from his home to his office, via the same route, covering s feet at a speed of x feet per minute. Today he took a different route and ended up walking 10% more than he usually does, at a speed of x meters per minute. What is the percentage change in the time he took today compared to the time he takes on a usual day? (1 feet = 0.3 meter)

A. 10% decrease
B. 10% increase
C. 67% decrease
D. 67% increase
E. 200% decrease


Old route:

time = distance/rate

time = d/x

New route:

distance = 1.1d

We have to be careful to express the speed in the same unit of measurement:

rate = x m/min = (x m/1 min)(1 ft/0.3 m) = x/0.3 ft/min

time = 1.1d/(x/0.3) = (0.33)(d/x)

new time = (0.33)(old time)

A factor of 0.33 corresponds to a 67% decrease.

Answer: C
GMAT Club Bot
gmatclubot
Re: Every day, Tom walks from his home to his office, via the same route, [#permalink]
24 Jul 2023, 04:08
Moderators:
Bunuel
Math Expert
92915 posts
yashikaaggarwal
Senior Moderator - Masters Forum
3137 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions