Question

Two cube each of volume $8c{m}^3$ are joined end to end. Then what is the surface area of resulting cuboid?

Answer 1

Volume of cubes $s^3=8c{m}^3$

Measure of each side $s=2cm$

The two cubes are placed end to end.

Then,

Dimensions of the resulting cuboid =>

$Length=(2+2)cm=4cm$

$Breadth=Height=2cm$

Total surface area of the cuboid $=2(lb+lh\times +bh)$

$=>2\left[(4\times 2)+(4\times 2)+(2\times 2)\right]c{m}^2$

$=>[2\times (8+8+4\left)\right]c{m}^2$

$=>[2\times 20]c{m}^2$

$=>40c{m}^2$