Question

A room is 4 m long and 3 m 50 cm wide. How many square metres of carpet is needed to cover the floor of the room?

Answer 1

$\text{Length of room = 4}$



$\text{Breadth of room = 3 m 50 m}$
$\: \: \: \: \: \: \: \: \: \:\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \text{= 3.50 m}$



$\text{Area of carpet = L x B}$
$\: \: \: \: \: \: \: \: \: \:\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:= 4 \times 3.50$
$\: \: \: \: \: \: \: \: \: \:\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: {= 14 \: m}^{2}$



$<b>$
Therefore, ${14 \: m}^{2}$of carpet is needed to cover the floor of the room.

Answer 2

Answer:

$14m^{2}$

Step-by-step explanation:

According to the question

Length of a room, l = 4 m

Breadth of a room, b = 3 m 50 cm

                           $= 3\ m\ +\ 50\times \frac{1}{100}\ m$ [∵ 100 cm = 1 m

                                                                   50 cm =$\frac{1}{100}\times50\ m]$

                                      = 3 m + 0.5 m

                                      = 3.5 m

We have to find how many square meters of carpet is needed.

So, we need to find the area of a room.

We know that,

Area = l x b

        = 4 x 3.5

        = $14m^{2}$

∴ $14m^{2}$ carpet is needed to cover the floor of the room.