Question

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

Answer 1

Here, Given
Length $=80cm$
Breadth $=40cm$
Height $=20cm$
Total surface area $=2(lb+bh+hl)$
$=2(80\times 40+40\times 20+80\times 20)$
$=2(3200+800+1600)$
$=2\left(5600\right)=11200c{m}^2$
Lateral surface area $=2(l+b)h$
$=2(80+40)\times 20=2\times 120\times 20$
$=4800c{m}^2$
Hence, Lateral surface area of cuboid is $4800c{m}^2$