Q: There is a circular tube in a vertical plane. Two liquids which do not mix and of densities d1 and d2 are filled in the tube. Each liquid subtends 90° angle at centre. Radius joining their interface makes an angle a with vertical. Ratio d1/d2 is

(a) $\large \frac{1 + sin\alpha}{1 – sin\alpha}$

(b) $\large \frac{1 + cos\alpha}{1 – cos\alpha}$

(c) $\large \frac{1 + tan\alpha}{1 – tan\alpha}$

(d) $\large \frac{1 + sin\alpha}{1 – cos\alpha}$

Ans: (c)