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?

Answer 1

Answer: 48 minutes.

Step-by-step explanation:

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

Rosalinda can line a football field in 80 minutes.

If they work together, the number of minutes(C) they take to line the foot ball field

$\frac{1}{C}=\frac{1}{120}+\frac{1}{80}\\=\frac{2+3}{240}\\=\frac{5}{240}\\=\frac{1}{48}\\\Rightarrow\ C=48$

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