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?

a) 11.2 kg

b) 8.8 kg

c) 10.5 kg

d) 12.6 kg

please give correct answer

Answer 1

The correct answer is 12.6 kg.

Explanation:

Given,

Weight of zinc in the alloy =9.8kg

The ratio of gold and silver in a sample of electrum =9:7.

Let,

Weight of gold =9x

Weight of silver =7x

9.8=7x

x=1.4kg

∴ Weight of gold in the alloy =9x

=9(1.4)

=12.6kg

Hope it will help you!