Question

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

Answer 1

Answer:

LSA = 2 (lh+bh)

= 2 (80×20+40×20)

=2 (1600+800)

=2 (2400)

=4800cm2

TSA=2(lb+bh+hl)

=2 {(80×40)+(40×20)+(20×80)}

=2 (2400+800+1600)

=2 (4800)

=9600cm2

Answer 2

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

Thus, Lateral Surface Area is

${ \orange{ \bf{4800cm²}}}$

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