Landscape Maths: Dry-Matter Carbon and Nitrogen Balances

Landscape Maths: Dry-Matter Carbon and Nitrogen Balances

Original quantitative topic practice in English. All 24 questions are included in a shuffled order. Each question supplies its own data and model assumptions; use only those assumptions. Choose one answer. Practice target: 20/24, not an official examination pass mark. Keep full intermediate precision. These exercises cover the calculation scope in the title; they do not constitute a full Red Seal examination, trade qualification, site design or operating specification.
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A classroom blend combines 700 kg wet material A and 400 kg wet material B. Moisture fractions by wet mass are 60% and 40%. On a DRY-mass basis A contains 40% carbon and 2% nitrogen; B contains 45% carbon and 1% nitrogen. Compute masses and their ratio only. These inputs do not specify a composting recipe or process. Calculate the total water mass in kilograms. Keep intermediate values unrounded; round the final answer to 4 decimal places if needed.