A train running at 72 km/hr takes 15 seconds to pass a tree. What is the length of the train?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 300 m
A tree is a point object, so to pass it the train covers only its own length. Change the speed to m/s by multiplying by \(\frac{5}{18}\).
Speed \(\displaystyle =72\times\frac{5}{18}=20\) m/s
Length of the train \(=20\times15=300\) m