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?
a. 40 minutes
b. 80 minutes
c. 200 minutes
d. 240 minutes ? !

If they work together, they take 48 minutes to line the football field.

Step-by-step explanation:

Given: Reggie can line a football field in 120 minutes.  Rosalinda can line a football field in 80 minutes.  

To find : If they work together, how many minutes does it take them to line a football field?

Solution :

If they work together,

Let the number of minutes(x) they take to line the foot ball field.

According to question,

Cross multiply,

Therefore, If they work together, they take 48 minutes to line the football field.

 If they work together, they can line a football field in 48 minutes.

Step-by-step explanation:  Given that Reggie can line a football field in 120 minutes and Rosalinda can line a football field in 80 minutes.

We are to find the number of minutes does it take them to line a football field if they work together.

We have

Time taken by Reggie to line a football field = 120 minutes.

So, in 1 minute, Reggie can line part of the field.

Time taken by Rosalinda to line a football field = 80 minutes.

So, in 1 minute, Rosalinda can line part of the field.

Therefore, if they work together, the portion of the football field that they can lie in 1 minute is given by

Thus, if they work together, they can line a football field in 48 minutes.