Question

A box is in the form of a cuboid whose external measures are $50$cm $\times 40$ cm $\times 25$cm. Then base, the side faces and back face are to be painted black. Find the area to the painted.

Answer 1

The dimensions of cuboid are $50\times 40\times 25$

The Lateral surface area of cuboid is given by $2h(l+b)$

Here $l=50;b=40;h=25$

Lateral surface area $=2\times 25(50+40)=50\left(90\right)=4500c{m}^2$

And the base area $=lb=\left(40\right)\left(50\right)=2000c{m}^2$

So,the total area is $=4500+2000=6500c{m}^2$