Zebras

__**STUDENT NAMES: Belinda, Jenae, Mona **__

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 12x10= 120 11x12= 132 13x11=143 5x7=35

120+ 132 143 35 =430km^2



__**QUESTION 2**__

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">Find the area of the shaded and non shaded parts in the following shape <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">non-shaded = <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">23x13= 299m^2

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">Shaded= <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">17x26= 442m^2 <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">shaded - non shaded= <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">442- 299 <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">=143m^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?

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">2.4x 100= 240cm <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">6.2x100= 620cm <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">240x620= 148800cm^2

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">20x10=200cm^2 <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">148800/200=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%;">740/20 37.2

<span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">needs 38 boxes of 20

<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%;">10% of 740 <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">= 74 <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">74 tiles are cracked

<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%;">740+74= 814 tiles <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">814/20= 40.7 <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">41 boxes total <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">an extra 3 boxes

<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?