Answer:
3.2 hours or 192 minutes
Step-by-step explanation:
Since the rate is 2.5 in/h and we want 8 in as our final answer, we need to multiply this by some number of hours to get 8.
This means that 2.5 in/h * xh = 8.
Solving for x would give us 8 in/2.5 in/hr, which is 3.2 hours.