Question 1

Given a rectangle the length of 5cm and the width of
3cm. Find the area of this rectangle.

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Step 1

The picture below shows the rectangle with the length of 5cm and the width of 3cm.

Step 2

To calculate the area, we can use the formula for the area of a rectangle:

Step 3

Since the length is given as 5cm, we can substitute **l** with 5. Similarly, since the width is given as 3cm, we can substitute **w** with 3. After doing so, we can calculate for **A**, as shown below:

Step 4

Now, the calculated number **15** only has a meaning if we include the unit for it. Since the given length and width are in cm, the unit for area will be cm^{2}. Hence:

A = 15 cm^{2}

Step 5

Clearly, the answer is B.

To close the steps,
area of a rectangle practice page