Answer:
Sophie and Simon working together to peel the potatoes will it take 18 minutes
Step-by-step explanation:
First of all, we express the speed of peeling potatoes of each one as a rate
Sophie_rate [tex]\frac{potatoes}{45 min} \\[/tex]
Simon_rate [tex]\frac{potatoes}{30 min} \\[/tex]
Now add the fractions, like this:
[tex]\frac{1}{45} +\frac{1}{30} =\frac{1}{Totaltime} \\\frac{1}{45} +\frac{1}{30}=\frac{1}{18} \\Totaltime= 18 minutes[/tex]
