Question

Two identical trains cross each other moving on parallel tracks, opposite in direction. Speed of one of the train is 70 km/hr and the second train has a speed of 110 km/hr. If it takes 8 s for two trains to cross each other then length of trains is equal to?

• A. 100 m
• B. 200 m
• C. 300 m
• D. 400 m

Answer 1

Answer: (B)

200 m

Answer 2

Total distance to cover relatively = $2l$

$\Rightarrow 8=\frac{2l}{180\times\frac{5}{18}}$

$\Rightarrow l=200\,m$

The correct option is (B): $200 \;m$