# Volume of rainfall over an area of land

## Interactive practice questions

The roof of a house is flat and measures $16$16 m by $15$15 m in the shape of a rectangle.

a

What is the area of the roof?

b

If a water tank collects all the water from the roof, how many litres of water would it collect if there had been $20$20mm of rain?

c

After the water tank has become full, a further $10$10 mm of rain falls from the roof. How many litres of rainfall are not collected as a result?

Easy
Approx 4 minutes

The outline of a block of land is pictured below.

A floor plan for a house is shown below, with measurements given in mm. The annual rainfall over the house is $360$360 mm.

The image below shows the outline of a construction site for the foundations of a large office building.

### Outcomes

#### 10P.MT3.04

Solve problems involving the surface areas of prisms, pyramids, and cylinders, and the volumes of prisms, pyramids, cylinders, cones, and spheres, including problems involving combinations of these figures, using the metric system or the imperial system, as appropriate