Question

Question 20: Shubhi saw a beautiful ring which was made of Electrum. Electrum is an alloy

of gold and silver with a small amount of other metals and is white in colour.

The ratio of gold and silver in a sample of electrum is 9:7.If the weight of the silver in that

sample of alloy is 9.8 kg. Then, what is the weight of the gold in the alloy?​

Answer 1

Answer:

The correct answer is 12.6 kg.

Explanation:

Let the weight of alloy is x kg.

This amount of silver in alloy 7x/(7+9) =7x/16

Given the weight of the silver in that sample of alloy is 9.8 kg.

7x/16 =9.8

x=(16×9.8)/7=22.4 kg

Weight of gold in that sample=22.4–9.8=12.6 kg

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Answer 2

ANSWER

option d 12.6kg