an open box is made up of wood 3 cm thick its external Length breadth and height are 1.48 M 1.16 metre and 8.3 DM point find the cost of painting the inner surface at rupees 5 per m square
Answers
Answer:
We have to paint an area of 5.594m2. Hence the total cost of painting the internal surface of the box will be Rs 279.70
Step-by-step explanation:
Hint: Calculate the internal dimensions of the box using its external dimensions and its thickness. Then calculate the total surface area of the box using its internal dimensions. Finally multiply the obtained total area with the rate of cost of painting to get the answer.
Complete step-by-step answer:
According to the question, we have to find the cost of painting the inner surface. For this we need to find the surface area of the inner side.
From the given information about the box:
External length = 1.48 m
External breadth= 1.16m
External height=8.3dm =0.83m
Width of the box=3cm=0.03m
Let’s see the diagrams for better visualization:

This diagram is the isometric view. Let’s consider the top view also:

From the top view, we can see that: internal dimnsion=external dimension – 2 ××thickness.
So, internal length= external length - 2