The figure (iii) given below show the cross-section of a swimming pool 10 m broad, 2 m deep at one end and 3 m deep at the other end. Calculate the volume of water it will hold when full, given that its length is 40 m.

A swimming pool is 50 metres long and 15 metres wide. Its shallow and deep ends are $1\dfrac{1}{2}$ metres and $4\dfrac{1}{2}$ metres deep respectively. If the bottom of the pool slopes uniformly, find the amount of water required to fill the pool.

If the perimeter of a square is 80 cm, then its area is

1. 800 cm²

2. 600 cm²

3. 400 cm²

4. 200 cm²

Area of a parallelogram is 48 cm². If its height is 6 cm then its base is

1. 8 cm

2. 4 cm

3. 16 cm

4. None of these