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You measure two quantities as A=1.0m+-0....

You measure two quantities as `A=1.0m+-0.2m`,`B=2.0m+-0.2m`. We should report correct value for `sqrt(AB)` as

A

`1.4 m pm 0.4 m`

B

`1.41 m pm 0.15 m`

C

`1.4 m pm 0.3m `

D

`1.4 m pm 0.2 m`

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