What is the length of a digonal of a square of side `10cm`?

The length of a diagonal of a square of sides 5 cm is :

Find the length of the diagonal of a square of side 12 cm.

The diagonal of a square is 10 cm. What will be the length of the diagonal of the square whose area is double of the area of first square?

Find the diagonal of a square whose side is 10 cm.

If the length of the diagonal of a square is 10sqrt(2) cm , then what will be area of the square ?

The length of the diagonal of a square and that of the side of another square are both 10 cm. What is the ratio of the area of the first square to that of the second ?