A train 100 ,m long is moving with a velocity of 60, km h^{-1} . time it takes to cross bridge 1, km

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7. MOTION

easy

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.

Option A

Option B

Option C

Option D

Solution

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

$t=\frac{S}{v}=\frac{1100 \times 18}{60 \times 5}=66 s$

Standard 9

Science

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