Question

the ratio of Copper and Zinc in an alloy is 7:8 if the weight of zinc is 12.8 kg find the weight of copper in the alloy​

Answer 1

Ratio of Copper = 7

Ratio of Zinc = 8

The weight of Copper = 7x

The weight of Zinc = 8x = 12.8 kg

Therefore,

The value of x = 12.8/8

x = 1.6

Therefore,

The weight of Copper = 7x

= 7( 1.6 )

= 11.2 kg.

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Answer 2

Answer:

Weight of copper in an alloy is 11.2 kg.

Step-by-step explanation:

As per the given information in question.

Given,

Weight of zinc in an alloy = 12.8kg

The ratio of Copper and Zinc in an alloy is 7:8.

Let,

Weight of copper = 7x

Weight of zinc= 8x

12.8 = 8x

(Divide both sides of the equation by the same term)

$\frac{12.8}{8} =\frac{8x}{8}\\1.6 = \frac{8x}{8}\\x= 1.6$( 8 got cancelled)

∴ Weight of copper in an alloy = 7x

$=7(1.6)\\=11.2kg$.

Hence,

Weight of copper in an alloy is 11.2 kg.