Question

The diameter of circumcircle of a rectangle is 5 cm & breadth is 3 cm. Find length of AB.

• A. 3 cm
• B. 5 cm
• C. 4 cm
• D. None of the above

Answer 1

The correct option is C 4 cm

AC is hypotenuse.
In $△ABC,A{C}^2=A{B}^2+B{C}^2$
$AB=\sqrt{A{C}^2-B{C}^2}$
$=\sqrt{5^2-3^2}$
$AB=\sqrt{25-9}=\sqrt{16}$
$AB=4$ cm

So, option C is correct.