Hi, I found this question in another forum and was not convinced with the solution. Can you please solve? Thanks!
I do not have the OA.
13 men and 7 boys can finish a job in 7 days, while 6 boys and 13 women can finish the same job in 6 days. In how many days can 1 man, 1 boy and 1 woman working together finish the same job (assume constant rates each for men, women, and boys)?
A. 32
B. 54
C. 21
D. 63
E. 24
interesting work problem
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- ajith
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say 1 man can finish the work in m days he does 1/m in 1 day, 1 boycan finish the work in b days he does 1/b in 1 day; 1 woman can finish the work in w days he does 1/w in 1 dayace_gre wrote:Hi, I found this question in another forum and was not convinced with the solution. Can you please solve? Thanks!
I do not have the OA.
13 men and 7 boys can finish a job in 7 days, while 6 boys and 13 women can finish the same job in 6 days. In how many days can 1 man, 1 boy and 1 woman working together finish the same job (assume constant rates each for men, women, and boys)?
A. 32
B. 54
C. 21
D. 63
E. 24
13/m+7/b =1/7
6/b+13/w = 1/6
13/m+13/b+13/w = 13/42
1/m+1/b+1/w =1/42
So it would take 42 days for a man, a woman and a boy together to complete the work
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- sumanr84
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Group 1: 13M+7B = 7 days
Group 2 : 13W+6B = 6 days
The amount of work done by G1 in 1 day : 1/7 and by G2 in 1 day : 1/6
So, total work done by G1 and G2 together in 1 day, = 1/7 + 1/6
1 day work by 13(M+B+W) = 13/42 of work
1 day work by ( M+B+W) = 1/42 of work
so, altogether it would take 42 days for ( M+B+W) to finish the entire work.
Ans : 42
Group 2 : 13W+6B = 6 days
The amount of work done by G1 in 1 day : 1/7 and by G2 in 1 day : 1/6
So, total work done by G1 and G2 together in 1 day, = 1/7 + 1/6
1 day work by 13(M+B+W) = 13/42 of work
1 day work by ( M+B+W) = 1/42 of work
so, altogether it would take 42 days for ( M+B+W) to finish the entire work.
Ans : 42
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Hi..
I've worked on the problem. But, am getting 42 days.
13 Men + 7 Boy = 7 days. So, 1 day's work of 13 Men + 7 Boy = 1/7 --(1)
6 Boy + 13 Women = 6 days. So, 1day's Work of 6 Boy + 13 Women = 1/6 --(2)
(1) + (2) = 13 Men + (6+7) Boy + 13 Women = 1/6+1/7
13 Men + 13 Boy + 13 Women = 13/42 work in 1 day
So, 1Man + 1 Boy + 1 Woman = 1/42 work
So, 1Man + 1 Boy + 1 Woman will take 42 days to complete the whole job
I've worked on the problem. But, am getting 42 days.
13 Men + 7 Boy = 7 days. So, 1 day's work of 13 Men + 7 Boy = 1/7 --(1)
6 Boy + 13 Women = 6 days. So, 1day's Work of 6 Boy + 13 Women = 1/6 --(2)
(1) + (2) = 13 Men + (6+7) Boy + 13 Women = 1/6+1/7
13 Men + 13 Boy + 13 Women = 13/42 work in 1 day
So, 1Man + 1 Boy + 1 Woman = 1/42 work
So, 1Man + 1 Boy + 1 Woman will take 42 days to complete the whole job
- thephoenix
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(13m+7b)*7=(13w+6b)*6
--->7m+b=6w
---->1w=(7m+b)/6
1m+1b+1w=(13m+b)/6
now (13m+7b)*7=(13m+b)*x
x=42 days
which is not in option so cheers!!!!
--->7m+b=6w
---->1w=(7m+b)/6
1m+1b+1w=(13m+b)/6
now (13m+7b)*7=(13m+b)*x
x=42 days
which is not in option so cheers!!!!