Answer
About 7.2 cm
Work Step by Step
l$^2$=4$^2$+6$^2$
l$^2$=16+36=52
l=$\sqrt {52}$
l$\approx$7.2
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.