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The cost of 9kg of rice is $111.24a)what is the cost of 10kg?b)what is the cost of 10.6kg?

User Duffp
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2 Answers

23 votes
23 votes
10kg cost will be 123.6 Bc I kg cost is 12.36
10.6 kg cost will be 131.016
User Andrew W
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9 votes
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SOLUTION:

Case: Unit rates

Given: 9kg of rice cost $111.24

First we calculate the cost per kg

Since 9kg cost $111.24

1kg will be:


\begin{gathered} 1kg\text{ of rice =}(111.24)/(9) \\ 1kg\text{ of rice = 12.36} \end{gathered}

1kg costs $12.36

a) the cost of 10kg

The cost of 10kg will be:


\begin{gathered} 10kg\text{ of rice will be} \\ =\text{ 10 }*12.36 \\ =\text{ 123.60} \end{gathered}

The cost of 10kg of rice is $123.60

b) the cost of 10.6kg

The cost of 10.6kg will be:


\begin{gathered} 10.6kg\text{ of rice will be} \\ =10.6\text{ }*12.36 \\ =\text{ 131.0}2 \end{gathered}

The cost of 10.6kg of rice is $131.02

Final answer:

a) The cost of 10kg of rice is $123.60

b) The cost of 10.6kg of rice is $131.02

User RatDon
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