SSC GD 2024 PYQ — Question 48

The correct answer is option 1 i.e. 64 km/hr.

Given that

The speeds of both trains are equal = x

Length of each train = 320 meters

Time taken to cross each other = 18 seconds

Total length = 320 + 320 = 640 meters

Relative speed = x + x = 2x

Formula used

Speed = $\frac{Distance}{time}$

2x = $\frac{640}{18}$

x = $\frac{320}{18}$ m/s

To convert in km/h we multiply by = $\frac{18}{5}$

Hence x = 64 km/h

The speed of each train is 64 km/h.