3 boys or 5 girls can clean a compound in 8 hours. in how many hours will 2 boy 2 girls clean the same compound
To find out how many hours it will take for 2 boys and 2 girls to clean the compound, we need to determine the efficiency of the group.
First, we calculate the efficiency of one individual by dividing the total work hours by the number of people. In this case, we have 3 boys and 5 girls working together, so the total number of people is 3 + 5 = 8. The time taken to clean the compound is 8 hours, so the efficiency of one person is 8 hours / 8 people = 1 hour/person.
Now, we calculate the total efficiency of the group consisting of 2 boys and 2 girls. The total number of people in this group is 2 + 2 = 4.
Using the efficiency of one person (1 hour/person) that we calculated earlier, we can determine the total time required.
4 people working together with an efficiency of 1 hour/person would require 1 hour/person * 4 people = 4 hours/person.
Therefore, it will take 2 boys and 2 girls a total of 4 hours to clean the compound.