Question

solve fast...... ...... ...... ......

Answer 1

☆Hey Mate!!!☆

$volume \: of \: cube = {l}^{3} \\ 343 {cm}^{3} = {l}^{3} \\ \sqrt[3]{343 {cm}^{3} } = l \\ 7 \: cm \: = \: l$

Now,

$surface \: area = 6 {l}^{2} \\ = 6 \times {7}^{2} \\ = 6 \times 49 \\ = 294 {cm}^{2}$

Hope ot helps☺!