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

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

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

A person measures two quantities as A = 1.0 m +- 0.2 m ,B = 2.0 m +- 0.2 m We should report correct value for sqrt(AB) as

A person measures two quantities as A = 1.0 m +- 0.2 m ,B = 2.0 m +- 0.2 m We should report correct value for sqrt(AB) as

If L=20.04m pm 0.01m, B=2.52 m pm 0.02 m. The value of (LxxB) is