Skip to main content

About this free course

Download this course

Share this free course

An introduction to geology
An introduction to geology

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

2.19 How much ore for a metre of Cu cable?

How much copper ore do you need for 100 m of cable? 100 m of typical 3-core copper cable for electrical wiring weighs about 2 kg. Using this information, complete the activity below.

Activity 2.4 Cu cable

Timing: Allow about 5 minutes

At the Parys mine there is about 3,031,000 tonnes of copper ore, and there is 10.1 g copper per kg of ore (1.01%). How much ore from Parys Mountain needs to be mined to make a 100 m cable?

a. 

198 kg


b. 

20.2 kg


c. 

267 kg


The correct answer is a.

Discussion

The answer is 198 kg. The calculation required for this is:

two postfix times equation left hand side k times g postfix times o times f postfix times cap c times u postfix times equals right hand side equation left hand side 2000 times g divided by 10.1 postfix times g solidus k times g equals right hand side 198 postfix times k times g postfix times o times r times e