40 mm = 1.575 inches 40 mm = 4 cm
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It is, in fact, 1.75 mm thick, not 2 mm. So any reasons which tried to explain why it is 2 mm thick would be contradicted by reality!
40 mm = 4 cm
0.405 mm.
Since there are 1000 mm in one meter, then 40 mm is 40/1000 = 0.040 meters
No because 40 meters is equivalent to 40,000 mm