Answer:
12241.025
Step-by-step explanation:
Twelve thousand, two hundred and forty one point zero, two, five
The number is assumed to be x
x of 40% = 56
x * (40/100) = 56
x = 5600 / 40
x = 140
The first thing we must do for this case is to find the relationship between the variables.
We have then:

From here, we clear the value of "Y":


On the other hand we have:

From here, we clear the value of "x":

Then, replacing values we have:

On the other hand:

Finally, the perimeter is given by:

Substituting values we have:

Answer:
the perimeter of ABCD is:
44 units
Answer:49.70
Step-by-step explanation: