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Rates, SM-Bank 067

A fish market sells prawns in four different sizes.

Size 0.5 kg 1 kg 2 kg 4 kg
Price $8.25 $16.30 $34.00 $65.50

What is the lowest price a customer can pay for 6 kg of prawns?  (2 marks)

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\($97.80\)

Show Worked Solution

\(\text{Calculate the cost per kg for each size:}\)

\(0.5\text{kg}\) \(=$8.25\times 2=$16.50\text{/kg}\)
\(1\text{kg}\) \(= $16.30\text{/kg}\)
\(2\text{kg}\) \(=\dfrac{34.00}{2} = $17.00\text{/kg}\)
\(4\text{kg}\) \(=\dfrac{65.50}{4} \approx $16.38\text{/kg}\)

  

\(\therefore\ \text{Cheapest price to buy 6 kg}\)

\(=6\times 16.30\)

\(=$97.80\)