How do you solve this?

Question

All-purpose carpeting costs $27.50 per square meter. What is the cost of carpeting a room from wall to wall whose dimensions are 360 centimeters by 400 centimeters.

Answer 1

First, you need to change centimeters to meters by dividing by 100, which involves moving the decimal point two places to the left.

360cm = 3.6m     and 400cm = 4m

To find the area of a rectangle multiply length times width.

A = lw

A = 4(3.6)

A = 14.4 m²

To find the cost to carpet the room, multiply

14.4(27.50) = $396

 

 

Answer 2

First, notice that the cost is given in square meters, but the room dimensions are given in centimeters.  So let's convert those centimeters to meters.  There are 100 centimeters per meter.  Hence:

 

360 centimeters = (360 cm)/100 cm per m) = 3.6 meters

400 centimeters = (400 cm)/(100 cm per m) = 4 meters

 

The area of the room is:

 

Area = length * width = 4 * 3.6 = 14.4 square meters

 

Cost = (14.4 sq. m)*($27.50 per sq. m) = _______

 

Can you finish it from here?