Find the lateral surface area and total surface area of a cuboid of length 80 cm,
Question:

Find the lateral surface area and total surface area of a cuboid of length 80 cm, breadth 40 cm and height 20 cm.

Solution:

Given that:

Cuboid length (l) = 80 cm

Height (h) = 20 cm

We know that,

Total Surface Area = 2[lb + bh + hl]

= 2[(80)(40) + (40)(20) + (20)(80)]

= 2[3200 + 800 + 1600]

= 2[5600]

$=11200 \mathrm{~cm}^{2}$

Lateral Surface Area = 2[l + b]h

= 2[80 + 40]20

= 40[120]

$=4800 \mathrm{~cm}^{2}$