Question

2) Daca un cub are diagonala egala cu 6 radical din 3 cm atunci aria totala a cubului este de .....cm patrati.m

Answer 1

$d= l\sqrt{3} \Rightarrow l= \frac{d}{\sqrt{3}} = \frac{ 6\sqrt{3} }{ \sqrt{3} }=6~(cm). \\ A_{t}= 6l^{2}=6* 6^{2}=216~(cm ^{2})$

Answer 2

At=6xl²
diagonala =√3l²
l=6cm
At= 6 ×6²=216cm²