Year 7 Interactive Maths - Second Edition

Problem Solving

Example 4

Find the cost of carpeting a room 10 m long and 6 m wide at $5 per square metre.

Solution:

So, the cost of carpeting the room is $300.

Note:

To find the area of a region enclosed within a plane figure, draw a diagram and write an appropriate formula.  Then substitute the given values and use a calculator, if necessary, to obtain the required area.