Answer
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Hint: Here, we will first find out the number of days a man takes to build a house. Since more men will take less time to complete the same work, so divide the number of men by the obtained solution to calculate the number of days.
Complete step-by-step solution
It is given that 35 workers can build a house in 160 days.
Now we will find the number of days it will take one man to build a house.
\[
{\text{No. of days one man take to build house}} = 35 \times 160 \\
= 5600{\text{ days}} \\
\]
Since when more men will build a house, it will take fewer days than only one man.
We will find the number of days it will take 28 men to build a house, working at the same rate.
\[
{\text{No. of days 28 men take to build house}} = \dfrac{{5600}}{{28}} \\
= 200{\text{ days}} \\
\]
Thus, 28 workers take 200 days to build the house, working at the same rate.
Note: In this question, some students mistakenly multiply the value to find the number of days more men will take to build a house, which is wrong. Also, we are supposed to write the values properly to avoid any miscalculation.
Complete step-by-step solution
It is given that 35 workers can build a house in 160 days.
Now we will find the number of days it will take one man to build a house.
\[
{\text{No. of days one man take to build house}} = 35 \times 160 \\
= 5600{\text{ days}} \\
\]
Since when more men will build a house, it will take fewer days than only one man.
We will find the number of days it will take 28 men to build a house, working at the same rate.
\[
{\text{No. of days 28 men take to build house}} = \dfrac{{5600}}{{28}} \\
= 200{\text{ days}} \\
\]
Thus, 28 workers take 200 days to build the house, working at the same rate.
Note: In this question, some students mistakenly multiply the value to find the number of days more men will take to build a house, which is wrong. Also, we are supposed to write the values properly to avoid any miscalculation.
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