Step-by-step explanation
To find the perimeter of a rectangle, add the lengths of the rectangle's four sides.
Step 1
Let
W represents the width
L represents the lengh
hence,the length of a rectangle is 3 times its width.
traslate,
and the perimeter is 72,so
Step 2
solve the equations:
a)replace equation (1) in equation (2)
it means the width is 9 units
b)
now, replace the W value in equation (1)
so, for the original rectangle
Step 3
now , find the new perimeter if the length were increased by 2
Let
Length= 27 units + 2 units=29 units
width=9 units
replace to find the perimeter
I hope this helps you