Crocodiles

__**STUDENT NAMES: linda, helen, brock **__

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

area1 - 275km2 area2-120km2 area 3- 35km2 total - 430km2



__**QUESTION 2**__

Find the area of the shaded and non shaded parts in the following shape shaded- 143m2 non shaded- 299m2 

__**QUESTION 3**__

Bill is about to tile an external wall with tiles that are 20cm long and 10cm wide.

a. How many tiles will be needed if the wall measures 2.4m by 6.2m? area of wall ( 2.4*6.2=14.88m2) tile area (20*10=200cm2) number tiles (14.88/200= 7.44 ~8 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? 1 box <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? 1 <span style="font-family: 'Comic Sans MS',cursive; font-size: 120%;">d. How many tiles will he have left over? 10 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?