Two objects A and B are of lengths 5 cm ...

Two objects A and B are of lengths 5 cm and 7cm determined with errors 0.1 cm and 0.2 cm respectively.What is the error in determing (a) the total length and (b) the difference in their lengths?

0.1 cm & 0.3 cm

0.3 cm & 0.3 cm

0.3 cm & 0.1 cm

0.4 cm & 0.4 cm

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