Question

12 calculate the area of a rectangle with a length = 7 cm and a width = 4 cm if the dimensions are tripled? 56 squared cm 252 squared cm 84 squared cm 66 squared cm skip 11/12 complete

Explanation:

Step1: Find new length and width

The original length is 7 cm and width is 4 cm. When dimensions are tripled, new length $l = 7\times3=21$ cm and new width $w = 4\times3 = 12$ cm.

Step2: Calculate the area

The area formula of a rectangle is $A=l\times w$. Substitute $l = 21$ cm and $w = 12$ cm into the formula, so $A=21\times12 = 252$ $cm^{2}$.

Answer:

252 squared cm