40 inches is 101.6 centimeters.
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40 cm equals 400 mm. This is because there are 10 millimeters in 1 centimeter.
1 cm = 10 mm 2 cm = 20 mm . . 10 cm = 100 mm . . 15 cm = 150 mm
200 cm equals 2000 mm. This is because there are 10 millimeters in one centimeter.
That is two millimeters.Ten mm equals to 1 cm
80 cm equals 800 mm.