Question

Team A and Team B build houses for Habitat for Humanity. If the teams work together, they can build a house in 4 days. Team A working alone can complete a house in 10 days. If the teams work together for 3 days, but then Team B leaves, how much longer will Team A need to finish the house?

Answer 1

Answer:

7.5 days

Step-by-step explanation:

A working = 10 days

AB working = 4 days

AB = 4 --> 10B = 4

                  /10  /10

B = .4

AB = 3

A(.4) = 3

/.4     /.4

A working alone = 7 .5 days

*pretty much solve for B and then equal AB to the amount of days the worked together before B left, 3 days, then it gives you the amount of time A must work to finish the house alone*