The length and the breadth of a conference hall are in the ratio 7 : 4 and its perimeter is 110 m. Find :

(i) area of the floor of the hall.

(ii) number of tiles, each a rectangle of size 25 cm x 20 cm, required for flooring of the hall.

(iii) the cost of the tiles at the rate of ₹ 1,400 per hundred tiles.

The parallel sides of a trapezium are 12 cm and 10 cm. If the distance between the parallel sides is 10 cm; the area of the trapezium is :

1. 220 cm²

2. 110 cm²

3. 55 cm²

4. 165 cm²

The adjacent sides of a parallelogram are 12 cm and 9 cm. The distance between longer sides is 6 cm; the distance between shorter sides is :

1. 12 cm

2. 9 cm

3. 8 cm

4. 6 cm

Each side of a rhombus is 9 cm and the distance between its opposite sides is 6 cm. The area of the rhombus is :

1. 54 cm²

2. 108 cm²

3. 27 cm²

4. 13.5 cm²