Question

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

Answer 1

Answer:

Lateral Surface area = 2(l + b ) h = 2 ( 80 + 40 ) 20

= 160 + 80 × 20 = 240 × 20 = 4800 cm ^2

Total Surface area = 2( lb + lh + bh)

= 2 ( 80 × 40 + 80 × 20 + 40 × 20)

= 5600cm^2

Step-by-step explanation:

hope it helps.....

Answer 2

$\huge\fbox \red{Solution:}$

Given:

Dimensions of a cuboid:

Length (l) = 80 cm

Breadth (b) = 40 cm

Height (h) = 20 cm

We know that, Total Surface Area = 2[lb + bh + hl]

By substituting the values, we get

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

= 2[3200+800+1600]

= 2[5600]

= 11200

Therefore, Total Surface Area = 11200 cm2

Now,

Lateral Surface Area = 2[l + b]h

= 2[80+40]20

= 40[120]

= 4800

$\fbox \blue{Thus, Lateral Surface Area is 4800 cm sq}$