Two trains of the same length are running on parallel tracks in the same direction at 44 km/h and 32 km/hr. The faster train passes the other train in 72 seconds. What is the sum of the lengths (in m) of both the trains?

Given, 

Two trains of the same length are running on parallel tracks in the same direction at 44 km/h and 32km/hr.

We know, When Train are in same direction then Relative speed is difference between the speeds of both trains.

Relative speed = 44 - 32 = 12 km/hr

i.e; $$12\times\ \frac{5}{18}=\frac{10}{3}$$ m/s

Time = 72 seconds (given)

Distance = $$speed\ \times\ time$$

= $$\frac{10}{3}\times\ 72=240\ m$$

$$\therefore\ $$ Distance covered is the sum of length of both the trains. 

Hence, Option A is correct.