As you already know, the area of a square is found by squaring the length of one side. Here, the length of one side is 4, and 4^2 is 16. The perimeter of a square is found by multiplying 4 to the length of a side. 4*4 = 16.
It is 0.09. this is because you do 3 multiply by 0.6. then you do 1.8divided by 20 because you want per one minute so that becomes 0.09 and that is your answer. Hope this helps I am really close to ranking up so if you can award me the most brainliest that would be great!! thanks and your welcome