1. A square wall is covered with square tiles. There are 85 tiles altogether…….along the 2 diagonals.How many tiles are there on the whole wall?

1. A square wall is covered with square tiles. There are 85 tiles altogether…….along the 2 diagonals.How many tiles are there on the whole wall?

1. A square wall is covered with square tiles. There are 85 tiles altogether…….along the 2 diagonals.How many tiles are there on the whole wall?

1. A square wall is covered with square tiles. There are 85 tiles altogether…….along the 2 diagonals.How many tiles are there on the whole wall?
Since there are 85 tiles along the diagonal, that means there are 85 tiles on each of the sides of the square wall. And since area of the square is `A = a^2` (where `A` is the area of the square and `a` is the length of a side of square), the total number of tiles on whole wall is `85 ^2 = 7225.` There are 7225 tiles in the whole wall.For visual explanation click the following link.I hope this helps.