Question 1048947
.
The area of square garden is 4/25 km^2. How long is each side?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


Do you know that the area of a square is the square of its side?
The square of the length of the square, I mean?


In other words, the area = {{{a^2}}}.


Then a = {{{sqrt(area)}}},  or  a = {{{sqrt(4/25)}}} = {{{2/5}}} km = 400 meters.