Test Index

WAEC Agriculture 2013 Paper

Question : 16

Total: 60

a 100kg NPK 15: 15: 15 compound fertilizer has a filler make -up weight of

Solution:

Concept:

\mathrm{NPK}\ 15:15:15

compound fertilizer contains

15\%

nitrogen,

15\%

phosphorus, and

15\%

potassium by weight.

The remaining weight in the bag is the filler.

Explanation:

For a

100\ \text{kg}

bag, each nutrient contributes

15\%

of the total weight.

Nitrogen weight

= 15\% \times 100 = 15\ \text{kg}

Phosphorus weight

= 15\% \times 100 = 15\ \text{kg}

Potassium weight

= 15\% \times 100 = 15\ \text{kg}

Total nutrient weight

= 15 + 15 + 15 = 45\ \text{kg}

Filler weight

= \text{total fertilizer weight} - \text{total nutrient weight}

Filler weight

= 100 - 45 = 55\ \text{kg}

Answer:

55\ \text{kg}

Go to Question:

Prev Question

Next Question