Final answer:
The requirement to keep a daily driving log generally depends on specific industry standards and laws. Without context, it's impossible to accurately determine the radius within which logging is not required. However, calculations for average speed and total distance can be made with given travel data.
Step-by-step explanation:
The regulations on maintaining a daily log for driving typically depend on the industry standards and laws of a particular country or region. This question seems to suggest that there is an exemption from keeping a log if the driving is contained within a certain distance from the start point. However, without specific legal context, it is impossible to provide an accurate answer. In the realm of transportation regulation, different areas have varying rules regarding distance exemptions. For instance, in the context of the commercial vehicle industry, different countries, such as the United States and Canada, have Hours of Service regulations that can dictate when a log needs to be kept based on distance driven.
For educational purposes, if this were a question about a physics concept such as average speed or total distance, you could calculate various parameters given a set of distances and travel times. For example, if you drive 150 kilometers in 3.2 hours, your average speed would be the total distance divided by the total time, which is approximately 46.88 km/h. However, this does not directly address the question about exemptions from keeping a daily log based on radius of travel.