Copper plate

Copper plate length 3.2 m and width 50 cm weighs 55.42 kg. What is the plate thick, if 1 m³ of copper weighs about 8700 kg?

Correct answer:

d =  4 mm

Step-by-step explanation:

$d={\displaystyle \frac{55.42}{3.2\cdot {\displaystyle \frac{50}{100}}\cdot 8700}}\cdot 1000=4\text{ mm}$

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