A train $100 \,m$ long is moving with a velocity of $60\, km h^{-1}$. Find the time it takes to cross the bridge $1\, km$ long.
A train $100 \,m$ long is moving with a velocity of $60\, km h^{-1}$. Find the time it takes to cross the bridge $1\, km$ long.
Given length' of train $=100 m$, length of bridge $=1 km =1000 m , v=60 km h ^{-1}$
Total distance to cover $100+1000=1100 m$
Therefore, time taken
$t=\frac{S}{v}=\frac{1100 \times 18}{60 \times 5}=66 s$
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