Question

lesson 5: quadrilaterals
effect of changes in dimension on area
which of the following is the area of a 4 cm by 6 cm rectangle when the dimensions are doubled?
a. 96 cm
b. 48 cm
c. 24 cm
d. 216 cm
check answer

Explanation:

Step1: Find the new dimensions

The original dimensions are 4 cm and 6 cm. When doubled, the new length is $4\times2 = 8$ cm and the new width is $6\times2=12$ cm.

Step2: Calculate the area of the new rectangle

The area formula for a rectangle is $A = l\times w$. So, $A=8\times12 = 96$ $cm^{2}$.

Answer:

A. 96 $cm^{2}$