Final answer:
The typical speed limit in a playground zone from dawn to dusk is 30 km/h, but it's important to check local regulations as they can vary.
Step-by-step explanation:
The question pertains to the conversion of speed units and understanding of speed limits in different zones. A playground zone typically has a reduced speed limit to ensure the safety of children and pedestrians. This question asks what speed limit is in effect every day from dawn to dusk, but the provided reference information seems to be about the conversion between kilometers per hour and meters per second, and does not directly answer the specific question about playground speed limits.
However, based on common traffic rules, the speed limit in a playground zone from dawn to dusk is often 30 km/h. It's important to always check local traffic regulations as speed limits can vary by jurisdiction.