Bithional is an example of

Pressure inside two soap bubbles are $1.02 \,atm$ and $1.05 \,atm$ respectively. The ratio of their surface area is .........

Let $M$ be the foot of the perpendicular from a point $P$ on the parabola $y^2=8(x-3)$ onto its directrix and let $S$ be the focus of the parabola. If $\triangle SPM$ is an equilateral triangle,then $P$ is equal to

The equation of the circle concentric with the circle $x^2+y^2-6x+12y+15=0$ and having double its area is

Nuclear fusion is common to the pair:

In $\triangle ABC$,the midpoints of the sides $AB, BC$,and $CA$ are respectively $(l, 0, 0), (0, m, 0)$,and $(0, 0, n)$. Then,$\frac{AB^2+BC^2+CA^2}{l^2+m^2+n^2}$ is equal to