A train runs for 3 hours at a speed of 55 km per hour and for the next 2 hours at a speed of 65 km per hour. Find the average speed of the train for the 5 hours journey.

Question

$\begin{array}{1 1} (A) 56\;km \\ (B) 46\;km \\ (C) 59\;km \\ (D) 63\;km \end{array}$