Aptitude - 3 men finish painting a wall in 8 days. Four boys do the same job in 7 days. In how many days will 2

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3 men finish painting a wall in 8 days. Four boys do the same job in 7 days. In how many days will 2 men and 2 boys working together paint two such walls of the same size?

a) 6 6/13 days

b) 3 3/13 days

c) 9 2/5 days

d) 12 12/13 days

Total Answers and Comments: 6

Last Update: February 10, 2008 Asked by: nurankl84

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Best Rated Answer

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Submitted by: keerthi

The ans for this q is 6 6/13

Above answer was rated as good by the following members:
piyush_dnma, atulchowdhary

July 14, 2006 09:48:28

keerthi

RE: 3 men finish painting a wall in 8 days. Four boys ...

The ans for this q is 6 6/13

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Overall Rating: +1

August 16, 2006 09:47:03

srinu

RE: 3 men finish painting a wall in 8 days. Four boys ...

The answer is 6 6/13.

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September 19, 2006 16:28:40

mandar dindorkar

RE: 3 men finish painting a wall in 8 days. Four boys ...

3 men -> 8 days

as men decrease => days increase

=> 1 man ->24 days =>1 man's 1 day work = 1/24

4 boys -> 7 days

=> 1 boy ->28 days => 1 boy's 1 day work = 1/28

so 2 men + 2 boys 1 day work = 2/24 + 2/28 = 1/12+ 1/14 = 13/84

so 2men + 2boys finish 13/84 of work in 1 day

so days to finish total work = 84/13 i.e 6 6/13

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December 27, 2006 07:07:14

abbs

RE: 3 men finish painting a wall in 8 days. Four boys ...

The answer is D. We have been asked to calculate days required to paint TWO such walls hence 2*84/13 i.e. 12 12/13 days is the answer.

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September 17, 2007 02:32:06

Akshaya

RE: 3 men finish painting a wall in 8 days. Four boys ...

The answer is 3 3/13 .
b coz...
He asks 2men and 2 boys working together to paint 2 walls not for a one wall.

2 men + 2 boys takes 6 6/13 days to paint for a one wall

For 2 walls it will be 3 3/13.

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February 10, 2008 00:50:09

subhrojitn

Member Since: February 2008 Contribution: 2

RE: 3 men finish painting a wall in 8 days. Four boys do the same job in 7 days. In how many days will 2 men and 2 boys working together paint two such walls of the same size? a) 6 6/13 days b) 3 3/13 days c) 9 2/5 days d) 12 12/13 days

i man can paint 1/24 th part of the wall
i boy paints 1/28 th part

.
. . 2 boys and 2 men paints 1/12+1/14 th part;13/84 th part in one day
.
. . to complete one wall they take 84/13 days

.
. . two walls takes 2*84/13 days
         12
or 12 ---    days
         13

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