Question

the ratio of zinc and copper in an alloy is 7:9 if the weight of copper in the alloy is 11.7 kg find the weight of zinc in The alloy​

Answer 1

Step-by-step explanation:

The ratio of zinc and copper in the alloy =7:9

Weight of copper=11.7 kg

sum of the ratio = 7+9= 16

Weight of zinc = 7/16*11.7=5.11875 kg Answer

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Answer 2

$\huge\mathfrak\green{\underline{Answer:\:9.1\:kg}}$

$\rule{100}2$

It is given that the ratio of zince and copper in an alloy is 7 : 9.

And we have to find it's weight. So, try to solve it by ratio and proportion method. It would be easier to understand.

Let's do it!

According to Question :-

Let the weight of zinc be ' z '

7 : 9 : : z : 11.7

$\sf\implies \dfrac{7}{9}=\dfrac{z}{11.7}$

$\sf\implies {11.7}\times{7} = 9\times {z}\\\\ \implies 81.9=9z$

$\sf\implies {z}=\dfrac{81.9}{9}$

∴ z = 9.1

Hence,

The weight of zinc is 9.1 kg.

$\rule{200}2$