A house takes eight hours to be built by four men. How much time would it take one man to build it?

To solve this problem, we need to understand that the time taken to build the house is inversely proportional to the number of men working.

Step 1: Find the total man-hours to build the house First, we calculate the total man-hours it takes to build the house. We do this by multiplying the number of men by the number of hours they work. In this case, it's 4 men * 8 hours = 32 man-hours.

Step 2: Calculate the time for one man Next, we calculate how long it would take one man to do the same amount of work. Since one man can work 1 hour at a time, it would take him the total man-hours to build the house. So, it would take one man 32 hours to build the house.