Final answer:
To determine how long it will take for a 30-inch sheet of plastic to melt at a rate of 2.5 inches per hour, divide the length of the plastic sheet by the melting rate, which results in 12 hours for complete melting.
Step-by-step explanation:
The question is asking to calculate the time it will take for a 30-inch sheet of plastic to melt completely if it melts at a rate of 2.5 inches per hour. To find this, we need to perform a simple division operation, dividing the total length of the plastic by the rate at which it melts.
Step-by-step Solution:
- Determine the total length of the plastic sheet, which is 30 inches.
- Determine the rate of melting, which is 2.5 inches per hour.
- Divide the total length by the rate of melting to find the time it takes to melt completely.
Applying the calculation:
Time = Total Length / Rate of Melting
Time = 30 inches / 2.5 inches per hour = 12 hours
Therefore, it would take 12 hours for the sheet of plastic to melt completely.