Question

8. The ratio of copper and zinc in an alloy is 9:5. If the weight of zinc in the alloy is 9.5 g
what is the weight of copper in it?
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Answer 1

$\huge\underline {\sf {Answer:}}$

$\underline {\rm {Given:}}$

• The ratio of copper and zinc in an alloy is 9:5
• The weight of zinc in the alloy is 9.5 g

$\underline {\rm {Find:}}$

• The weight of copper in it.

$\underline {\rm {Solution:}}$

➦ The given question is that of propagation.

Let the value of copper be x

So, we can write it as ,

• 9 : 5 :: x : 9.5

✬Substituting the values in the expression :

➫ 9 : 5 :: x : 9.5

➫$\dfrac {9}{5} = \dfrac {x}{9.5}$

➫5x = 9 × 9.5

➫5x = 85.5

➫x = $\dfrac {85.5}{5}$

➫x = 17.1 g

Thus, from the given solution the weight of copper in the alloy is 17.1 g.

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