Software Development

Formulae and Calculating in the Correct Order

Assignment 1 - Task F

Practice questions to help you with Assignment 1 task f


Note: The formula for calculating the area of a circle is pi * r * r. However, a close approximation to this is 22/7 * r * r

 

Question 1       

 
Choose the correct formula for calculating the lawn area shown in the diagram?

L1 * W1 - L2 * W2
  
L1 * W1 + L2 * W2
  
L1 + W1 * L2 + W2
  
L1 * W1 * L2 * W2

 

Question 2       

 
Choose the correct formula for calculating the field area shown in the diagram?

length * width + pi * r * r
  
length * width - 21/7 * r * r
  
length * width + 21/7 * r * r
  
length * width + 21/7 * d

 

Question 3       

 
Ms Lawnsword performed the following calculations on the lawns shown below but kept getting the wrong answer.



1. Lawn1 area = length * width
2. Lawn2 area = 22/7 * r * r
3. Total area = lawn1 area + lawn2 area
4. Number of bags of lawn seed = lawn seed amount / amount in a bag
5. Lawn seed amount = total area * amount that covers 1 square meter

Which one of the calculation lines above is she trying to carry out too soon?

line 1
line 2
line 3
line 4
line 5

 

Question 4       

 
Ms Lawnsword calculated that two different fields need the following amounts of hay meadow seed. Field1 needs 400 grams, Field 2 needs 1600 grams.

She wrote down the formulae for calculating the number of bags as follows...


1. Number of bags for Field1 = Field1 amount / amount in a bag
2. Number of bags for Field2 = Field2 amount / amount in a bag
3. Total number of bags of seed = Number of bags for Field1 + Number of bags for Field2

Her son says this is incorrect and she should use the following formulae...

1. Total seed amount = Field1 amount + Field2 amount
2. Number of bags of seed = total seed amount / amount in a bag

Who is correct?

Ms Lawnsword
Ms Lawnsword's son
Neither of them is correct
Both of them are correct

Fini
 

 

 

   

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