A room having the dimensions as mentioned in the chart below has a table, a bed and a chair. There are three books kept on the table (side by side) and also a lamp having radius, 3.5 inch. Now, on the basis of information given below answer the following?

Sr. No.	Object	Length	Breadth	Height
1.	Room	18 feet	12 feet	12 feet
2.	Bed	3.5 feet	6 feet	3 feet
3.	Table	3 feet	4 feet	4 feet
4.	Chair	2 feet	2.5 feet	4 feet
5.	Books	12 inch	6 inch	3 inch

How many tables are required to cover the floor surface of the room completely?

The correct option is 18.

Step 1: Understand the Given Dimensions

From the table provided in the question, we have the following dimensions:

• Room: Length = 18 feet, Breadth = 12 feet

• Table: Length = 3 feet, Breadth = 4 feet

Step 2: Calculate the Floor Area of the Room

The total surface area of the room's floor is calculated by multiplying its length by its breadth:

$\text{Floor Area}=\text{Length}\times \text{Breadth}$

$\text{Floor Area}=18\text{feet}\times 12\text{feet}=216{\text{feet}}^2$

Step 3: Calculate the Area Covered by One Table

The floor area covered by a single table is calculated using its length and breadth:

$\text{Table Area}=\text{Length}\times \text{Breadth}$

$\text{Table Area}=3\text{feet}\times 4\text{feet}=12{\text{feet}}^2$

Step 4: Calculate the Number of Tables Required

To find how many tables are needed to cover the entire floor surface of the room, divide the total floor area of the room by the area covered by one table:

$\text{Number of Tables}=\frac{\text{Floor Area of Room}}{\text{Area of One Table}}$

$\text{Number of Tables}=\frac{216}{12}=18$

Thus, exactly 18 tables are required to cover the floor surface of the room completely.