Question

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


plz ans fast....​

Answer 1

Answer:

8.8 kg is the correct answer

Answer 2

Answer:Option D

Weight of the gold in the alloy =12.6kg

Step-by-step explanation:

Given:-

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 thatsample of alloy is 9.8 kg.

To find:-

what is the weight of the gold in the alloy?

Solution:-

The ratio of gold and silver in the sample of Electrum=9:7

Let the weight of the gold be 9x

and the weight of the silver be 7x

according to the given problem

Weight of the silver in the sample=9.8 kg

=>7x=9.8

=>x=9.8/7

=>x=1.4 kg

then 9x=9×1.4=12.6 kg

Answer:-

Weight of the gold in the alloy =12.6kg