Help anyone can help me do this question,I will mark brainlest.

side of cube=5
We know
[tex]\boxed{\sf Side=\dfrac{Diagonal}{\sqrt{2}}}[/tex]
[tex]\\ \sf \longmapsto Diagonal =sude\times \sqrt{2}[/tex]
[tex]\\ \sf \longmapsto Diagonal=5\sqrt{2}[/tex]
[tex]\\ \sf \longmapsto Diagonal=5\times 1.4[/tex]
[tex]\\ \sf \longmapsto Diagonal=7cm[/tex]
Answer:
Hello,
Step-by-step explanation:
[tex]Using\ the\ Pythagorian's\ theorem,\\\\EC^2=EA^2+AC^2\\\\=EA^2+AB^2+BC^2\\\\=3*5^2\\\\EC=5\sqrt{3} \approx{8,660...}[/tex]