For the following questions answer them individually
A hemisphere and a cone have equal bases. If their heights are also equal, the ratio of their curved surfaces will be
If $$ x = \sqrt{\frac{\sqrt{5} + 1}{\sqrt{5} - 1}}$$, then the value of $$5x^2 - 5x -1 $$ is
If √2 = 1.4142, find the value of $$2\sqrt{2} + \sqrt{2} + \frac{1}{2+\sqrt{2}} + \frac{1}{\sqrt{2} + 1}$$