Question

of cementing its floor and walls at 35 per m'.
5 m
1. A cubical box with lid has a length of 30 cm. Find the cost of painting the inside
and outside of the box at 5.50 per mº,
find the total surface area of the new​

Answer 1

Step-by-step explanation:

We have to find the surface area of the cubical box.

Surface area of the cube = 6a² where a = 30 cm

⇒ 6*30*30

⇒ 5400 sq cm

As the cubical box has to be painted both from the outside and inside.

So, the total surface area = Inner surface area + outer surface area

⇒ 5400 + 5400

= 10800 sq cm

As we know that 1 sq m = 10000 sq cm

Surface area in sq m = 10800/10000

Surface area in sq m = 1.08 sq m

Cost of painting the cubical box = Rs. 5.50 per sq m

Total cost of painting = 5.5*1.08

Total cost = Rs. 5.94

So, the total cost of painting the cubical box from outside and inside is 5.94. Answer ....

i hope it was helpful to u

thank you.....