P, Q and S are moving on a circular stadium of circumference 2100 m. When P completes one round, Q is still 700 m behind. When S completes one round, Q is 300 m ahead of him. How far from the starting point three of them will meet for the first time?

The areas of the three adjacent faces of a rectangular box which meet in a point are known. The product of these areas is equal to

The diagonal of a square field is 110 m. Its area is