Find the total surface area of a cuboid whose length is 20 cm, width is 15 cm, and height is 8 cm.

1160 cm²

We know that,

Total surface area of the cuboid = 2(length × width + length × height + width × height)

We have,

Length of cuboid = 20 cm

width = 15 cm

height = 8 cm

Total surface area of the cuboid = 2(20 × 15 + 20 × 8 + 15 × 8)

= 2 × 580 = 1160 cm²