Introduction
Task
Todays lesson is Tariffs. Date: 24 August 2021
Definition
-It is a cost rate that you are charged for consuming a quantity.
Examples of different Tariffs
Water Rates
Electricity
Telephone
Transportation
Tariffs has more or less the same formula, depending on the type of tariff and its respective unit.
E.g Telephone - Rand per unit of time
Rand X amount of time.( this is an example of a linear tariff)
Todays focus is Water tariffs. This is and example of a stepped tariff
| Group (kiloliters KL) | Cost (Rands R) |
| 0-5 kl (5) | Free(R0,00) |
| 5-15 kl (10) | R3,99/kl |
| 15-20 kl (5) | R8,51/kl |
| 20-50 kl (30) | R12,61 |
Example
Jaden lives in an apartment alone. His landlord gives him 17 liters of water per day. calculate how much does Jaden pay for the day.
17 kiloliters.
0-5 kl (5) = Free X 5kl(max) = R0,00 (first Bracket)
5-15 kl (10) = R3,99 X 10 kl = R 39,90 ( 5-15 =10 kl) (Second Bracket)
15-17 kl (2) =R8,51 X 2 kl = R 17, 02 (15kl - 17kl ) (Third Bracket )
Total = R 56,92 per day
Explanation:
If you max out a bracket then your have to find out the difference is then multiply it with the cost
5kl-15kl = 10 kl
10kl X R3.99
Process
Exercise
Water Tariffs
| Group (kiloliters KL) | Cost (Rands R) |
| 0-5 kl (5) | Free(R0,00) |
| 5-15 kl (10) | R3,99/kl |
| 15-20 kl (5) | R8,51/kl |
| 20-50 kl (30) | R12,61 |
1) Colbe lives with his family their house and uses 40 liters per day. calculate how much it cost this household per month.
(6)
2) Cheslin waters his garden every second day of the week. For each day he uses 20 liters. Calculate how much he uses for the week.
(6)
3) Stephen has a car wash, he uses 37 liters of water per day. He charges R50 per car. Today he had 10 clients, calculate if he makes a profit for today. (8)
See additional video links to help you answer the questions.
how to calculate tariffs
how to work with tables
Evaluation
Mark allocation
Question 1 6 marks
Question 2 6 marks
Question 3 8 marks
Conclusion
Water and Electricity Tariffs works similar to each other. The cost rates might be different but it works the same
bearing in mind it is the stepped tariff.
At the end of the lesson, if you do not understand we will be having correction in the next online class
I will notify you before hand how we will be conducting our next lesson so that you may get the best results to understand
todays concepts.
by next week 31 august 2021
When we are done with this tariffs we will take a look at how Tax tariffs work and how to calculate it.
Goodluck my Grade 11s
Credits
youtube. _- Tariffs