Question

2 cubes of each side 8cm are joined end to end to form a cuboid. Find the surface area of cuboid.

Answer 1

2 cubes of each side 8cm are joined.

then length of cuboid, l = 8+8 = 16cm
breadth, b = 8cm
height, h = 8cm

Surface area of cuboid = 2(lb +lh + bh)

S = 2(16×8 + 16×8 + 8×8)

S = 2(128 + 128 + 64)

S = 2 × 320

S = 640 cm^2

Total surface area of cuboid formed is 640 cm^2.