The perimeters of 2 squares are 40cm and 32cm. Find the perimeter of a third square whose area is equal to the difference of the areas of the two squares?  Pick:
A) 20cm B) 24cm C) 32cm D) 28cm E) 30cm
Side of the 1st square = 40/4= 
<gadget id="calculator">40/4</gadget>
<output>10</output>
10cm   Side of the 2nd square= 32/4= 
<gadget id="calculator">32/4</gadget>
<output>8</output>
8cm   Area of the 3rd square= 10^2 - 8^2 = 36cm^2   Side of the 3rd square = 6cm   Required perimeter = 6*4= 
<gadget id="calculator">6*4</gadget>
<output>24</output>
24cm   Answer is 24cm
<result>B</result>
The perimeters of 2 squares are 40cm and 32cm. Find the perimeter of a third square whose area is equal to the difference of the areas of the two squares?