2009-II-01
Ans: B
$\begin{array}{cl}
& 2^n \cdot 3^n \\
= & (
… Read $\begin{array}{cl}
& 2^n \cdot 3^n \\
= & (
$\begin{array}{cl}
= & 3
$\begin{array}{c
Let $\theta$ be the angle of depression of $Q$ from $P$
$\begin{array}
$\begin{array}{c|c|c|c}
& \text{sphere }