The diagonal of a rectangle is sqrt(41) cm. and its area is 20 sq. cm. The perimeter of the rectangle must be:
Select the correct option
A) 22  B) 18  C) 19  D) 27  E) 62
Explanation:   \inline {\color{Black}\sqrt{l^{2}+b^{2}}=\sqrt{41}}   Also, lb=20   \inline {\color{Black}(l+b)^2=(l^{2}+b^{2})+2lb=41+40= 
<gadget id="calculator">41+40</gadget>
<output>81</output>
81}   (l + b)= 9.   Perimeter = 2(l + b) = 18 cm.   Answer: 18) 18 cm
<result>B</result>
The diagonal of a rectangle is sqrt(41) cm. and its area is 20 sq. cm. The perimeter of the rectangle must be: