Question

An alloy of zinc and copper weighs 12 1⁄2 kg. If, in the alloy, the ratio of zinc and copper is
1:4 , find the weight of copper in it.

Answer 1

Answer:

10 kg

Step-by-step explanation:

First write the things already given in question

12 ½kg= 25/2

sum of ratio is 5

so,

zinc= 1/5×25/2

= 5/2 kg

copper = 4/5×25/2

= 10 kg

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Answer 2

Answer: 10 kg

Step-by-step explanation:

• 1. Convert the mixed fraction into an improper fraction.

=> 12 1/2 = 25/2

2. Add the ratio given in the question.

=> 1:4

1+4 = 5

3. To find the weight of zinc:

=> 1/5 x 25/2

= 5/2

4. To find the weight of copper:

=> 4/5 x 25/2

= 10 [5x2]

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