Question

2 cubes each of side 4cm are joined end to end. Find the surface area of the resulting cuboid

Answer 1

as we know that when we joined two cubes so length is 4*2=8cm
breadth is 4cm
height is 4cm
so ATQ
LBH is 8*4*4=128cm cube

Answer 2

For the resulting cube:

l = 4 + 4 = 8cm

b = 4cm

h = 4cm

$\therefore$ $\sf\red{Surface\:area\:of\: the\:resulting\:cuboid}$

$\longrightarrow$$\sf\purple{2(lb+bh+hl)}$

$\longrightarrow$$\sf\purple{2(8×4+4×4+4×8){cm}^{2}}$

$\longrightarrow$$\sf\purple{2(32+16+32){cm}^{2}}$

$\longrightarrow$$\sf\purple{{160cm}^{2}}$