Final answer:
The speed limit of 80 km/h is equivalent to 22.2 m/s and 49.7 mi/h, and the speed limit of 100 km/h is equivalent to 62 mi/h. The exact speed limit on a 2-lane undivided highway can vary based on location.
Step-by-step explanation:
The speed limit on a 2-lane undivided highway can vary depending on the jurisdiction, but to answer the conversion related to speed limits provided in the question - if the speed limit on some interstate highways is roughly 80 km/h, this translates to approximately 22.2 meters per second (m/s). Converting 80 km/h to miles per hour (mi/h), it comes out to be 49.7 miles per hour. This is because 1 km/h equals about 0.27778 m/s and 0.621371 mi/h. Therefore, option 'b' would be the correct choice.
In the case where the speed limit is approximately 100 km/h, this is equivalent to 27.78 m/s, or about 62.14 mph, since 100 km/h is about 1.60934 miles per 1000 meters and an hour includes 3600 seconds. Thus, a speed limit of 100 km/h equates to roughly 62 miles per hour when converted.