A picture is to be pasted inside a frame. The frame will be cut out of a piece of steel, so as to keep the weight minimum. The final area should be $28\;cm^2$. The inside of the frame where the picture has to be pasted has to be 11 cm by 6 cm. What should be the width of the metal ?

Question

$\begin{array}{1 1} (a)\;0.75\;cm \\ (b)\;75\;cm \\ (c)\;0.045\;cm \\(d)\;0.4567\;cm \end{array} $