Frankie can build a speaker box in 120 minutes. Tisha can build a speaker box 40 minutes faster. If they work together, how many minutes does it take them to build the speaker box?
The first thing you should know is how long it takes each one to build a box. We have then: Frankie = 120minutes Tisha = 120-40 = 80minutes Then, we take the average: (120 + 80) / (2) = (200) / (2) = 100 minutes. answer It takes them to build the speaker box 100 minutes.
