if 5 man can do a piece of work in 28 days then find the number of men to do same work in 7 days
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28 men can complete the job in 5 days.
Step-by-step explanation:
It is given that 10 men can complete half the job in 7 days.
Let x men can complete the job in 5 days.
Formula for time and work:
\dfrac{n_1\times d_1}{w_1}=\dfrac{n_2\times d_2}{w_2}
w
1
n
1
×d
1
=
w
2
n
2
×d
2
where, n is number of men, d is days and w is work.
\dfrac{10\times 7}{\frac{1}{2}}=\dfrac{x\times 5}{1}
2
1
10×7
=
1
x×5
\dfrac{70\times 2}{1}=5x
1
70×2
=5x
140=5x140=5x
Divide both sides by 5.
\dfrac{140}{5}=x
5
140
=x
28=x28=x
Therefore, the 28 men can complete the job in 5 days.
#Learn more
How many men need to be employed to complete a job in 5 days, if 15 men can complete 1/3 of the job in 7 days ?
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