|
|
Drought
maths
|
Victorian Essential Learning Standards Domains and (Levels):
Mathematics (3,4,5)
Duration: 1 hour.
Setting: The classroom. |
What
is a drought?
There is no strict definition of drought, broadly it means that
over a period of time rainfall is abnormally low and there is not
enough water. In Australia we hear in the news that droughts affect
farms because there is less feed and water available for farms to
produce animals and crops. Here are some examples of drought maths
farmers may need to do in a drought. You may need a calculator for
some of these!
| 1. |
You
have 50 cattle who need 3 kg of wheat each per day (in addition
to a small amount of hay). Your farm has 3 tonnes of wheat left
in the silo (1 tonne = 1000kg) How long will your wheat last? |
| 2a. |
Your cow needs 70 megajoules (MJ) of energy per day. Barley
contains 12 MJ/kg. How many kg of barley should you feed your
cow per day? |
| 2b. |
You
have 100 cattle, how much barley would you feed your cattle
per day? |
| 2c. |
If
barley costs $130 per tonne (= $0.13 per kg) what is the cost
per day of feeding your cattle? |
| 2d. |
If you need to feed your cattle with barley for the whole year
(365 days) how much would you spend on barley? |
References
| » |
Bureau
of Meteorology - www.bom.gov.au search 'live drought'. |
| » |
Drought
information for Victoria - www.dpi.vic.gov.au
Type 'drought' into key word search to find information on drought.
|
|
