The price of 357 mangoes is Rs. 1517.25. What will be the approximate price of 49 dozens of such mangoes ?

Answer: Option D

Let the required price be Rs. x
More mangoes, More price (Direct proportion)
$$\begin{array}{rl}& \therefore 357:\left(49\times 12\right)::1517.25:x\\ & \iff 357x=\left(49\times 12\times 1517.25\right)\\ & \iff x=\frac{\left(49\times 12\times 1517.25\right)}{357}\\ & \iff x=2499\end{array}$$
Hence, the approximate price is Rs. 2500