Copper sheet

The copper plate has a length of 1 m, width 94 cm and weighs 9 kg. What is the plate thickness, if 1 m³ weighs 8715 kg?

Correct result:

h =  1.1 mm

Solution:

$h={\displaystyle \frac{V}{ab\rho }}=1000\cdot {\displaystyle \frac{9}{1\cdot 0.94\cdot 8715}}=1.1\text{ mm}$

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