The perimeters of two squares are 40 cm and 36 cm. Find the perimeter of a third square whose area is equal to the difference of the areas of the two squares .  Pick:  A) 17.6 cm  B) 24 cm  C) 26 cm  D) 28 cm  E) 29 cm
Explanation:   We know perimeter of square = 4(side)   So Side of first square = 40/4= 
<gadget id="calculator">40/4</gadget>
<output>10</output>
10 cm   Side of second square= 36/4= 
<gadget id="calculator">36/4</gadget>
<output>9</output>
9 cm   17.6 cmrea of third Square= 10*10 - 9*9= 
<gadget id="calculator">10*10 - 9*9</gadget>
<output>19</output>
19 cm   So side of third square= 4.4 [because area of square = side*side]   Perimeter = 4*Side = 4*4.4= 
<gadget id="calculator">4*4.4</gadget>
<output>17.6</output>
17.6 cm   17.6 cmnswer: Option 17.6 cm
<result>A</result>
The perimeters of two squares are 40 cm and 36 cm. Find the perimeter of a third square whose area is equal to the difference of the areas of the two squares .