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# A train 100m long is moving with a velocity of 60km/hr. Find the time taken by it to cross the bridge 1km long.

Given,

Length of train = 100m

Length of bridge = 1km = 1000m

Then, the total distance to be travelled = length of train + length of bridgee = 100 + 1100 =

**1100m**Velocity/Speed = 60km/hr =

**$60\times \frac{5}{18}$ = $\frac{50}{3}m/s$**Time taken to cross the bridge, t = ?

We know that-

**$Distance=Speed\times Time$**

Then,

**$Time=\frac{Distance}{Speed}$****$Time=\frac{1100}{\frac{50}{3}}$**

**$Time=\frac{1100\times 3}{50}$**

**$Time=66sec$**

Thus, the time taken by train to cross the 1km long bridge is

**66sec.**

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