Answer
The letter weighs 0.029kg
Work Step by Step
$29g\times\frac{1kg}{1000g}=\frac{29}{1000}kg=0.029kg$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.