Question

The length of a rectangle is 3 times its width. What is the length of the rectangle if the area is 48 square centimeters?

a. 4

b. 9

c. 12

d. 16

Answer 1

Answer:

3x×x=48

4x^2=48

and x=√12

then length=3×√12

=6√3

Answer 2

Answer:

hope it helps

Step-by-step explanation:

Let the width of rectangle=x

Then length of the rectangle = 3x

Perimeter of the rectangle = 96cm

2(l+b) = 96m

X+3x = 48

x = 12cm

Breadth of rectangle = 12cm

Length of rectangle = 3×12=36cm