Question detail
A life cycle assessment states that manufacturing uses 15% of 300 liters of water. Which option is the correct manufacturing water volume?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Life cycle assessment and recycling
Question
- A. 45 liters
- B. 50 liters
- C. 55 liters
- D. 60 liters
Answer
The correct option is 45 liters. The correct option is 45 liters. It is correct because 15% of 300 liters is 0.15 ? 300 = 45 liters. The other options, 50 liters, 55 liters and 60 liters, are too high and do not follow the stated LCA percentage calculation.
Explanation
The correct option is 45 liters. The correct option is 45 liters. It is correct because 15% of 300 liters is 0.15 ? 300 = 45 liters. The other options, 50 liters, 55 liters and 60 liters, are too high and do not follow the stated LCA percentage calculation. This explanation supports the correct answer and shows why the distractors do not match the Unit 4.10 objective.
Common mistake
Misunderstanding Decimal Use
Students often confuse the use of decimals with whole numbers when interpreting LCA data, leading to incorrect calculations.
Practice converting whole numbers to decimals and ensure to use appropriate decimal places based on the context of the data.
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