BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

7 cars in 7 days

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

7 cars in 7 days

by sanju09 » Tue Nov 15, 2011 3:33 am
If 7 workers can build 7 cars in 7 days, then how many days would it take 5 workers to build 5 cars?
(A) 1
(B) 5
(C) 7
(D) 25
(E) 35
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3835
Joined: Fri Apr 02, 2010 10:00 pm
Location: Milpitas, CA
Thanked: 1854 times
Followed by:523 members
GMAT Score:770

by Anurag@Gurome » Tue Nov 15, 2011 3:36 am
sanju09 wrote:If 7 workers can build 7 cars in 7 days, then how many days would it take 5 workers to build 5 cars?
(A) 1
(B) 5
(C) 7
(D) 25
(E) 35
7 workers can build 7 cars in 7 days.
1 worker can build 7 cars in 7*7 = 49 days
1 worker can build 1 car in 49/7 = 7 days
1 worker can build 5 cars in 7*5 = 35 days
5 workers can build 5 cars in 35/5 = 7 days

The correct answer is C.
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/
Top
Legendary Member
Posts: 966
Joined: Sat Jan 02, 2010 8:06 am
Thanked: 230 times
Followed by:21 members

by shankar.ashwin » Tue Nov 15, 2011 3:38 am
Total man hours = 7 days * 7 workers = 49.

Man hour / car = 49/ 7 = 7

for 5 cars you need 5*7 = 35 man hours.

You have 5 workers, so they would need to work for 7 days. C IMO
Top
Post new topic Post Reply
• Page 1 of 1