Copper wire

What is the weight in kg of copper wire 200 m long with a diameter of 0.6 cm, if the density of copper is 8.8 kg?

Correct result:

m =  49.7628 kg

Solution:

l=200 m dm=200 10  dm=2000 dm D=0.6 cm dm=0.6/10  dm=0.06 dm ρ=8.8 kg/dm3  V=π (D/2)2 l=3.1416 (0.06/2)2 20005.6549 dm3  m=ρ V=8.8 5.6549=49.7628 kg



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