6см 1мм is equal to 60.1mm40мм is equal to 4см.
So, the total length is60.1mm + 4см = 64.1mm + 4см = 64.1mm + 0.4 = 64.5mm
5дм is equal to 50см12см is equal to 1дм 2см.
So, the total length is50см + 1дм 2см = 50см + 10см + 2см = 60см + 2см = 62см
Therefore, the combined length is 64.5mm + 62см = 64.5mm + 620мм = 684.5mm.
6см 1мм is equal to 60.1mm
40мм is equal to 4см.
So, the total length is
60.1mm + 4см = 64.1mm + 4см = 64.1mm + 0.4 = 64.5mm
5дм is equal to 50см
12см is equal to 1дм 2см.
So, the total length is
50см + 1дм 2см = 50см + 10см + 2см = 60см + 2см = 62см
Therefore, the combined length is 64.5mm + 62см = 64.5mm + 620мм = 684.5mm.