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 m².
Two cubes of side 4 cm are fixed together. Find the total surface area of the new
solid formed.
0540
90,00 QT
30
30
60
Answers
A cubical box with lid has a length of 30 cm. Find the cost of painting the hids and outside of the box at 5.50 per m2
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:
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
Step-by-step explanation:
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