The diagonal of a rectangle is √41 cm and its area is 20 sq. cm. The perimeter of the rectangle must be:
Choices.
A) 18
B) 28
C) 38
D) 48
E) 58
Explanation:   l2 + b2 = 41   Also, lb = 20   (l + b)2 = l2 + b2 + 2lb   = 41 + 40= 
<gadget id="calculator">41 + 40</gadget>
<output>81</output>
81   (l + b)= 9   Perimeter = 2(l + b) = 18 cm. 18nswer: 18
<result>A</result>
The diagonal of a rectangle is √41 cm and its area is 20 sq. cm. The perimeter of the rectangle must be: