Question

Reggie can line a football field in 120 minutes. Rosalinda can line a football field in 80 minutes. If they work together, how many minutes does it take them to line a football field?40 minutes 48 minutes200 minutes 240 minutes

Answer 1

48 minutes.

Explanation:

Reggie can line
`(1)/(120)` of a football field in one minute.

Rosalinda can line
`(1)/(80)` of a football field in one minute.

`(1)/(120)` +
`(1)/(80)` =
`(1)/(48)`, so together, they can line
`(1)/(48)` of a football field in one minute.

`(1)/(48)` * 48 = 1

They can line 1 football field together in 48 minutes.