Fertilizer bags have numbers on them to indicate the proportions of various chemicals. A 12-7-5 means there is 12% nitrogen, 7% phosphorus and 5% potassium. How many kilograms of nitrogen will be in a 3 tonne truckload of fertilizer? Answer to the nearest TENTH.(Enter the numbers with no symbols.) (Use the conversion 1 tonne=1000kg in your answer)
Question
Fertilizer bags have numbers on them to indicate the proportions of various chemicals. A 12-7-5 means there is 12% nitrogen, 7% phosphorus and 5% potassium. How many kilograms of nitrogen will be in a 3 tonne truckload of fertilizer? Answer to the nearest TENTH.(Enter the numbers with no symbols.) (Use the conversion 1 tonne=1000kg in your answer)
Solution
First, we need to convert the weight of the fertilizer from tonnes to kilograms. Given that 1 tonne equals 1000 kg, a 3-tonne truckload of fertilizer would weigh 3000 kg.
Next, we need to find out how much of this weight is nitrogen. The fertilizer bag indicates that 12% of the fertilizer is nitrogen.
To find the weight of the nitrogen, we multiply the total weight of the fertilizer by the percentage of nitrogen.
So, 3000 kg * 12% = 360 kg.
Therefore, there are 360 kg of nitrogen in a 3-tonne truckload of fertilizer.
Rounding to the nearest tenth, the answer is 360.0 kg.
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