20m 10cm = 2010 cm13m 70CM = 1370 cmHCF 2010 = 1370 × 1 + 6401370 = 640 × 2 + 90640 = 90 × 7 + 1090 = 10 × 9 + 0So HCF = 10So the HCF is 10cmHope it helps you.
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