Final answer:
To calculate the amount of scouring powder used at the average station in a year, we need to know the rate at which the powder is used. We can then multiply the rate by the number of days in a year to get the total amount used.
Step-by-step explanation:
To calculate the amount of scouring powder used at the average station in a year, we need more information. We need to know the rate at which the powder is used at the station. If we have the rate in pounds per day, we can multiply it by the number of days in a year (365) to get the total amount used in a year. For example, if the rate is 5 pounds per day, the total amount used in a year would be 5 pounds/day * 365 days/year = 1825 pounds.