Question

The volume of a cube is 343 cm'. Its total surface area is

(a) $196c{m}^2$

(b) $49c{m}^2$

(c) $294c{m}^2$

(d) $147c{m}^2$

Answer 1

Volume of cube $=343c{m}^2$

$\therefore$ Side $=\sqrt[3]{3343}=\sqrt[3]{37\times 7\times 7}=7cm$

$\therefore$ Total surface area $=6(side{)}^2$

$=6\times (7{)}^2=6\times 49c{m}^2$

$=294c{m}^2$