Ratio, SM-Bank 038

Damon buys 25 kilograms of salt for his pool for $33.75.

The salt can be purchased in 1 kilogram bags.

How much does 9 kilograms of salt cost? (2 marks)

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$$12.15$

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$\text{C}\text{ost of 1 kilogram}$

$=\dfrac{33.75}{25}$

$= $1.35$

$\therefore\ \text{C}\text{ost of 9 kilograms}$

$= 9\times 1.35$

$= $12.15$