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

 It is currently 22 Aug 2019, 04:41

### 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

# If four men working at the same rate can do of a job in 40 minutes, ho

Author Message
TAGS:

### Hide Tags

Senior RC Moderator
Joined: 02 Nov 2016
Posts: 3459
GPA: 3.39
If four men working at the same rate can do of a job in 40 minutes, ho  [#permalink]

### Show Tags

Updated on: 05 Jan 2019, 10:27
1
1
00:00

Difficulty:

15% (low)

Question Stats:

87% (01:41) correct 13% (02:02) wrong based on 64 sessions

### HideShow timer Statistics

If four men working at the same rate can do $$\frac{2}{3}$$ of a job in 40 minutes, how many minutes would it take one man working at this rate to do $$\frac{2}{5}$$ of the job?

A. 80
B. 88
C. 92
D. 96
E. 112

Source: Kaplan GMAT Math Workbook - Sixth Edition
Page# 303

_________________

Last edited by SajjadAhmad on 05 Jan 2019, 10:27, edited 2 times in total.
Manager
Joined: 01 May 2017
Posts: 82
Location: India
If four men working at the same rate can do of a job in 40 minutes, ho  [#permalink]

### Show Tags

05 Jan 2019, 20:14
2
If four men working at the same rate can do 2/3 of a job in 40 minutes, how many minutes would it take one man working at this rate to do 2/5 of the job?

Four men can do a job in 40 min
1 man's can same work in 40*4 = 160 min
Amount of work = 2/3

Same amount of work can be done by one man in how many min's?
Amount of work= 2/5

work
2/3 ----------------------- 160 min
2/5 ------------------------ ? min (let it be x min)

$$x = ((2/5)*160)/(2/3) = 96 min$$

Option D is correct
VP
Joined: 31 Oct 2013
Posts: 1429
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: If four men working at the same rate can do of a job in 40 minutes, ho  [#permalink]

### Show Tags

06 Jan 2019, 18:55
2
If four men working at the same rate can do $$\frac{2}{3}$$ of a job in 40 minutes, how many minutes would it take one man working at this rate to do $$\frac{2}{5}$$ of the job?

A. 80
B. 88
C. 92
D. 96
E. 112

Source: Kaplan GMAT Math Workbook - Sixth Edition
Page# 303

There is a perfect formula for this kinda question.

No. of workers * Rate* Time = work

4*R*40 = 2/3

Rate = 1/240.

Now we have only 1 man and need to do 2/5 of the work.

1* 1/240 * Time = 2/5

Time = 240*2/5

Time = 96 mins.

Re: If four men working at the same rate can do of a job in 40 minutes, ho   [#permalink] 06 Jan 2019, 18:55
Display posts from previous: Sort by