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 minutes
200 minutes
240 minutes

Answer 1

@jim_thompson5910

Answer 2

I'd say it is probably be 200 minutes.

Answer 3

It's very similar to the last problem


x = time it takes Reggie to do the job alone (with no help)
y = time it takes Rosalinda to do the job alone (with no help)
z = time it takes to do the job if the two worked together


All times (x,y,z) are in minutes


In this case,
x = 120 min
y = 80 min
z = unknown


\[\Large \frac{1}{x} + \frac{1}{y} = \frac{1}{z}\]

\[\Large \frac{1}{120} + \frac{1}{80} = \frac{1}{z}\]

solve for z

Answer 4

Okay. This link should help you.

http://brainly.com/question/636217

Answer 5

Hope this helped! Have a great day!

Also a medal would be much appreciated! Just click best response next to my answer. Thank You!

@Gabylovesyou