The length of a rod is (11.05 +or- 0.2)cm. What is the length of two rods? a)(22.1 +or- 0.05)cm b)(22.1 +or- 0.1)cm c)(22.10 +or- 0.05)cm d)(22.10 +or- 0.2)cm
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The errors always gets added up.
So,
Length of two rods will be :
(11.05+11.05)±(0.2+0.2)
-> (22.10 ± 0.4) cm
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