Final answer:
If Earth's rotation slowed down so that it completed exactly one rotation about its axis in 100 hours, the typical time interval between sunrise and sunset would be 25 hours 50 minutes.
Step-by-step explanation:
If Earth's rotation slowed down so that it completed exactly one rotation about its axis in 100 hours (instead of 24), the typical time interval between sunrise and sunset would be d. 25 hours 50 minutes.
Currently, Earth completes one rotation every 24 hours, which gives us our typical 24-hour day. If Earth's rotation were to slow down, it would still take 24 hours for the Sun to complete its apparent journey across the sky, but since Earth is rotating more slowly, it would take longer for a specific point on Earth to complete a full rotation and return to the same position.
In this case, if Earth rotates once every 100 hours, the time between sunrise and sunset would be longer than it is now. We can calculate it by dividing 100 hours by 4, since there are 4 time periods of sunrise, noon, sunset, and midnight in a 24-hour day. This gives us 25 hours, and since each hour consists of 60 minutes, the time interval between sunrise and sunset would be 25 hours 50 minutes.