Final answer:
The household uses 108 liters of hot water daily, calculated by taking 60% of their total daily water usage of 180 liters.
Step-by-step explanation:
The question involves calculating the amount of hot water used by a household based on a given average total water usage. To find the answer, we use the fact that 60% of the household's water usage is hot water. Given that the household uses 180 liters of water per day, the amount of hot water used can be calculated by multiplying the total water usage by the percentage that is hot, which is 0.60 (60%).
Calculation: 180 liters per day × 0.60 = 108 liters of hot water per day.
Therefore, this household uses 108 liters of hot water daily. It’s interesting to note that indoor water use has decreased in recent years due to more efficient appliances and fixtures, and knowing the amount of hot water a household uses can play a part in understanding water consumption patterns and potential conservation efforts.