Find that length of the side and perimeter of the square whose area is given below 49sq. m

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

What is the value of x in the this question ?

Collin did the work to see if 10 is a solution to the equation r/4=2.4