If L = 20.04 m `pm`0.01 m , B= 2.52 m `pm ` 0.02 m . What are the values of `(L xx B) and (L+B)` ?

Explanation

Given errors are absolute erors, while the rule says that percentage error x are to be added. Hence, the first step will be to convert the given absolute erros into percentage errors.
`L= 20.04 m pm (0.01)/(20.04) xx10% = 20.04m pm 0.05 %`
`B = 2.52 m pm (0.02)/(2.52)xx100% = 2.52 m pm 0.79 % `