15 hours (60 seconds/1 minute) = 900 seconds

Yeah

What is your question because I don't know what i'm supposed to do.

Step-by-step explanation

Question - 15hours (60seconds/1minute) = 900 seconds

Step 1 - 1hr = 60 minutes

Step 2 - 15hrs = 15 x 60 minutes/1hr

Step 3 - Convert 15 hours into minutes

Step 4 - 15 hours x 60 minutes (60 minutes per hour) = 900mins

Step 5 - 15 hours = 60 x 60

Answer - 60 minutes/1 hour