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?

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

HELP?!

Answer 1

define a unit rate for 1 minute. how much work is done by each in 1 minute?

Answer 2

logically, if 1 person can do it in 80 minutes, then with some help they can do it in less then 80 minutes ...