450mm x 300mm
45cm x30cm
1350cm
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1 cm = 10 mm therefore the shelf is 450mm 450mm/9mm = 50 books
1 meter = 100 cm = 1000 mm there are 10 mm in 1cm so 300 mm = 30 cm. greater
millimeters = mm centimeters = cm 5 * 60 = 300mm 300mm = 30cm The chain would be 30cm long
160 cm
95 cm = 3 ft 1.4 in