In an alloy, the ratio of Copper and Zinc is 5 : 2. If 1.250 Kg of Zinc is mixedin 17 Kg 500 g of alloy, then the ratio of Copper and Zinc will be

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RRB GG Exam (Bhopal) 2009 click here to view all questions

In an alloy, the ratio of Copper and Zinc is 5 : 2. If 1.250 Kg of Zinc is mixed in 17 Kg 500 g of alloy, then the ratio of Copper and Zinc will be

A2 : 1

B2 : 3

C3 : 2

D1 : 2

prakash ? Dec 20 '2019 at 16:23

 

Correct answer is: 2 : 1

Explanation:

Quantity of copper in 17.5kg of alloy

\(=\Big(17.5 \times \frac{5}{7}\Big) \text{ kg}\)

 

= 12.5kg.

\(=\Big(17.5 \times \frac{2}{7}\Big) \text{ kg}\)

= 5kg

 

∴ Required ratio=12.5:(5+1.25)

= 12.5:6.25

= 2:1

 

 

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Correct answer is: 2 : 1 Explanation: Quantity of copper in 17.5kg of alloy \(=\Big(17.5 \times \frac{5}{7}\Big) \text{ kg}\)   = 12.5kg. \(=\Big(17.5 \times \frac{2}{7}\Big) \text{ kg}\) = 5kg   ∴ Required ratio=12.5:(5+1.25) = 12.5:6.25 = 2:1     prakash ? answered Dec 20 '2019 at 16:23 All Comments

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