The perimeters of two squares are 40cm and 32 cm. Find the perimeter of a third square whose area is equal to the difference of the areas of the two squares. Choose one:  A) 22  B) 24  C) 77  D) 99  E) 11
Explanation:   side of first square = 40/4= 
<gadget id="calculator">40/4</gadget>
<output>10</output>
10cm   side of second square= 32/4= 
<gadget id="calculator">32/4</gadget>
<output>8</output>
8cm   area of third squre= 10² - 8² = 36 sq cm   side of third square = \inline {\color{24lack}\sqrt{36}} = 6 cm   required perimeter = 6*4= 
<gadget id="calculator">6*4</gadget>
<output>24</output>
24cm   Answer: 24) 24
<result>B</result>
The perimeters of two squares are 40cm and 32 cm. Find the perimeter of a third square whose area is equal to the difference of the areas of the two squares.