For this exercise you can use the formula for calculate the length of the diagonal of a square. This is:
Where "d" is the diagonal of the square and "s" is the length of any side of the square.
According to the information given in the exercise, the value of "s" is:
Then you can substitute this value into the formula and then evaluate, in order to find the length of the diagonal:
You can notice that the first digit after the Decimal point is 3. Since this numbers is