x times x =15625

2x =15625

x =15625 divide 2

x = 7812.5

let y represent the lenght of one side y x y = 15,625

which means y²= 15,625

therefore y= √15,625

y= 125

but if on side has to be longer than the other side,that means

y greater than or equal to 125

and that’s your answer…so y can be =125 or=anything greater than 125 etc

well i think this question is not to specific,cos there are many possible answers