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Option 3 : 35 cm
Since the options given are in cm, we will convert 7 m, 3 m 85 cm, 12 m 95 cm into cm.
As 1 m = 100 cm, we get 7 m = 700 cm, 3 m 85 cm = 385 cm, 12 m 95 cm = 1295 cm.
Required length that can measure 700 cm, 385 cm and 1295 cm will be the HCF of it which is 35 cm.
∴ The greatest possible length is 35 cm.
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