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Friday, June 23 2017 @ 03:47 AM CDT
 Forum Index >  Test Paper Related >  Primary 4 Matters
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By: achieve_goal (offline)  Sunday, October 09 2011 @ 06:38 AM CDT (Read 1306 times)  
achieve_goal

The figure below is made up of 2 identical rectangles and two squares,A and B.

The perimeter of each rectangle is 44 cm. Find the area of the figure.


It is an attachment.

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By: myluckystar111 (offline)  Sunday, October 09 2011 @ 09:31 AM CDT  
myluckystar111

Hi,
Solution as follows:

Perimeter of each rectangle = 44cm
2 Lengths + 2 breadths = 44 cm
1 Length + 1 breadth = 44 divided by 2 = 22 cm (L = 18, B = 4 or L = 16, B= 6 or L = 15, B = 7. L + B should add up to sum of 22.. it does not matter, because the total area of the figure will be the same)

Let's take L = 18, and B = 4 (write this onto your diagram and you can see each side of the big square (the whole figure) = 18+22 cm

Area of the figure = (18+4) x (18+4) cm2 = 22x22 cm2 = 484 cm2

Ans: 484 cm2

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By: achieve_goal (offline)  Tuesday, October 11 2011 @ 07:56 AM CDT  
achieve_goal

thanks

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By: achieve_goal (offline)  Tuesday, October 11 2011 @ 07:56 AM CDT  
achieve_goal

thanks

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By: myluckystar111 (offline)  Thursday, October 13 2011 @ 07:28 PM CDT  
myluckystar111

You are most welcome! Big Grin

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