In one year, how much scouring powder is used at an average station?

The correct answer indicates that the average station utilizes 78 pounds of scouring powder in a year. This figure likely reflects an assessment based on the cleaning and maintenance needs of train stations, which require regular upkeep to ensure safety and hygiene for both passengers and staff. The 78-pound usage figure may have been determined through historical data, industry standards, or a survey of various station maintenance practices.

In the context of maintenance supplies, scouring powder is commonly used for cleaning surfaces, ensuring that stations remain presentable and sanitary. Different stations might have varying levels of foot traffic and thus differing levels of dirt and grime accumulation, which might influence the quantity of cleaning supplies needed. However, the chosen answer aligns well with an average estimate that balances the needs of typical usage across different stations, reflecting a standard approach to sanitation that promotes an efficient operational environment.

Other figures offered as choices could represent either low or high extremes based on specific incidents or less typical operational conditions. The choice of 78 pounds strikes a reasonable balance, hence its selection as the correct response.