Sterling silver is an alloy made by combining silver with copper in a ratio of 23 to 2. How much copper should be combined with 70 kg of silver to make sterling silver?

1 Answer
MeneerNask
Dec 31, 2016

#2Cuharr23Ag#. Question is #?Cuharr70Ag#
A ratio question.

Explanation:

#2div23=Xdiv70# or #2/23=X/70#

Cross-multiply:
#23X=2*70->X=(2*70)/23~~6.09# kg of copper.

Another way:

#70#kg amounts to #70/23=3,0347...# times as much as #27#

So we need #3,0347...# times as much copper (same answer)

Related questions
See all questions in Metals and Nonmetals
Impact of this question
3930 views around the world
You can reuse this answer
Creative Commons License