Question

MEDAL
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?

Answer 1

answer choices
240
80
48
40

Answer 2

frankie can do it in 120 minutes, tisha can do it in 80 minutes, together the can do it in \(t\) minutes

\[\frac{ 1 }{ 120 }+\frac{ 1 }{ 80 }=\frac{ 1 }{ t }\]
multiply by the lcd of 240t
\[2t+3t=240\]

Answer 3

80

Answer 4

48 sorry