Copper sheet

The copper plate has a length of 2.2 m, width 92 cm, and weighs 5.6 kg. What is the plate thickness if 1 m3 weighs 8732 kg?

Correct answer:

h =  0.3 mm

Step-by-step explanation:

a=2.2 m→ cm=2.2⋅ 100  cm=220 cm b=92 cm m=5.6 kg→ g=5.6⋅ 1000  g=5600 g ρ=8732 kg/m3→ g/cm3=8732:1000  g/cm3=8.732 g/cm3  m = ρ V V=m/ρ=5600/8.732≐641.3193 cm3  S=a⋅ b=220⋅ 92=20240 cm2  V = S⋅ c c=V/S=641.3193/20240≐0.0317 cm  h=c→ mm=c⋅ 10  mm=0.0317⋅ 10  mm=0.3 mm=0.3 mm

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