Ravi's school day is 5 hours long and he spends 40% of it in the activity block. How many minutes is that?

The answer must be in minutes, so convert the day first: 5 hours = $5\times 60=300$ minutes. Then 40% of $300=\frac{40}{100}\times 300=120$ minutes. The trap in "2 minutes" is taking 40% of the number 5 and labelling the result minutes — 40% of 5 hours is 2 HOURS. 24 minutes uses only one hour, and 180 minutes is the other 60% of the day.