Question

what is the area of this square? 40 km square kilometers

Explanation:

Step1: Recall area formula for square

The area formula for a square is $A = s^2$, where $s$ is the side - length of the square.

Step2: Substitute side - length value

Given that $s = 40$ km, we substitute $s$ into the formula: $A=(40)^2$.

Step3: Calculate the result

$(40)^2=40\times40 = 1600$ square kilometers.

Answer:

1600