If the perimeter and diagonal of a rectangle are 14 and 5 cms respectively, find its area. Choose the correct choice from the following answers.
A) 12 cm2 B) 16 cm2 C) 20 cm2 D) 24 cm E) None of these
In a rectangle,   (Perimeter)2/4=(diagonal)2+2×area   ⇒ (14)2/4=5(2)+2×area   49 = 25 + 2 × area   ∴ 12 cm2rea = 49−25/2=24/2= 
<gadget id="calculator">24/2</gadget>
<output>12</output>
12cm2   12 cm2nswer 12 cm2
<result>A</result>
If the perimeter and diagonal of a rectangle are 14 and 5 cms respectively, find its area.