We will have from smaller to greater:
1.2cm, 0.6 inches, 0.1 ft & 0.031m
That is because:
0.6 inch = 1.524 cm
0.1 ft = 3.048 cm
0.031m = 3.1 cm
From greater to least:
0.031m, 0.1 ft, 0.6 inch & 1.2 cm.
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