Answer:
7.27 min
Step-by-step explanation:
Given: Isaiah pick 3 apple in one minute.
Juanita pick 5 apple in two minutes.
They need to pick 40 apples.
Now, finding number of apple picked by Juanita in one minutes.
As given, Juanita pick 5 apple in two minutes.
⇒ Number of apple picked by Juanita in one minutes= 
∴ Total number of apples picked by Isaiah and Juanita in one minute= 
Hence, Total 5.5 apples picked by Isaiah and Juanita in one minute.
Next finding time taken to pick total 40 apples for a pie.
⇒ Time to pick 40 apples= 
Hence, 7.27 minutes taken to pick 40 apples.