Here is the solution for this question.
Given that the chessboard has 64 small squares.
And the area of per square is 6sq.cm. We are going to find the length of one side of the entire board.
So the first thing we are going to do is to find the square root of 6 and the result is 2.45. Therefore, one side of the single square is 2.45 centimeters. In a chessboard, per side consists of 8 squares. So we multiply 2.45 centimeters by 8 and the final result would be 19.6 centimeters. Hope this answer helps.
