Question

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

Answer 1

l=12cm
b=4cm
h=4cm

TSA of cuboid =2(lb+bh+hl)
2(12*4+4*4+4*12)
2(48+16+18)
2(82)
164cm2

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}}$