Two trains of the same length are running on parallel tracks in the same direction at 48 km/h & 36 km/h respectively . The faster train passed the other train in 81 seconds . What is the length (meters) of each train ?
Answer & explanation
Correct answer: option 4
When trains are moving in same direction than ,
Relative Speed = 48 km/h - 36 km/h = 12 km/h
to convert km/hr into m/sec
X km/hr × \(\frac{5}{18}\) = Y m/sec
Length of train = Speed × Time
Length of Train = 81 × 12 × \(\frac{5}{18}\) = 270 meter