Answer:
Option A
Explanation:
Let the required wages be Rs. $x$.
More men, More wages (Direct Proportion)
Less days, Less wages (Direct Proportion)
$\left\{\begin{array}{c}Men\quad\quad 6:9\\ Days\quad 15:12\end{array}\right\}::2100:x$
$\therefore(6\times 15\times x)$ $=(9\times 12\times 2100)$
$\Leftrightarrow x=\frac{9\times 12\times 2100}{6\times 15}$ $=2520.$
Hence, the required wages are Rs. 2520.
