How many seconds are there in an hour?

To determine how many seconds are in an hour, it's important to understand the basic unit conversions involving time. There are 60 seconds in a minute, and there are 60 minutes in an hour. By multiplying these two values together, you can find the total number of seconds in an hour.

Calculating it step-by-step:

1. Start with the number of seconds in one minute, which is 60.

2. Then, multiply this by the total number of minutes in an hour, which is also 60.

This gives: 60 seconds/minute × 60 minutes/hour = 3,600 seconds/hour.

Therefore, the correct answer is that there are 3,600 seconds in an hour, making it the right choice.