Elephants

__**STUDENT NAMES: Erica, Ashlee & megan **__

In groups, solve the following questions. Each question has a link which will show a diagram containing the problem. Type your working out and answers in the space provided below each question on this (wiki) page. NOTE: working out must be provided (as well as answers) to be awarded full marks

__**QUESTION 1**__

Divide the shape into rectangles and use the 'area' rule to find the total area of the object 10km x 12km = 120km 2

25km x 11km = 275km 2

7km X 5km = 35km 2

120km 2 + 275km 2 + 35km 2 = 430km 2



__**QUESTION 2**__

Find the area of the shaded and non shaded parts in the following shape

Little rectangle - 23m x 13m = 299m 2

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">Big Rectangle - 26m x 17m= 442m 2

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">Shaded area = 442m 2<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">-299m 2<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">=143m 2

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">non-shaded- 299m 2

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">__**QUESTION 3**__

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">Bill is about to tile an external wall with tiles that are 20cm long and 10cm wide.

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">a. How many tiles will be needed if the wall measures 2.4m by 6.2m? 744 tiles

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">b. If the tiles are sold in boxes of twenty, how many boxes should he buy?

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">After checking the tiles Bill finds that 10% of the tiles have cracks and can not be used

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">c. How many boxes of tiles should he order now?

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">d. How many tiles will he have left over?

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">Bill now tiles a neighbour's wall, which includes a door as shown in Picture 3.



<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">He uses 20cm by 40cm tiles. <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">e. Find the number of tiles needed to complete the job?