3 hours 30 minutes
Explanation:
Step 1: Time taken to prepare 1 bag for 1 person
= of a minute
= × 60
= 40 seconds
Time taken to prepare 1575 bags for 1 person
= 1575 × 40
= 63000 seconds
Time taken to prepare 1575 bags for 5 persons (Ashley + 4 friends)
=
= 12600 seconds
Step 2: To convert 12600 seconds into hours
1 hour = 3600 seconds
12600 seconds =
= 3 hours 30 minutes
Hence Ashley and 4 of her friends will take 3 hours 30 minutes to prepare 1575 bags.