Find the sum of the lengths of the bases of a trapezium whose area is 4.2 m² and whose height is 280 cm.

Find the height of a trapezium, the sum of the lengths of whose bases (parallel sides) is 60 cm and whose area is 600 cm².

Find the altitude of a trapezium whose area is 65 cm² and whose base are 13 cm and 26 cm.

Find the area of a trapezium whose parallel sides of lengths 10 cm and 15 cm are at a distance of 6 cm from each other. Calculate this area as

(i) the sum of the areas of two triangles and one rectangle.

(ii) the difference of the area of a rectangle and the sum of the areas of two triangles.

The area of a trapezium is 960 cm². If the parallel sides are 34 cm and 46 cm, find the distance between them.