Question

A
nnabelle is taking the train to see her boyfriend on Valentine's day! The train is 100 meters long and it takes 30 seconds to cross a 400m bridge. What speed is the train going at?

Answer 1

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Answer 2

Answer:

60 km/hr

Step-by-step explanation:

Length of train = 100 m

Length of bridge = 400 m

We are given that The train is 100 meters long and it takes 30 seconds to cross a 400m bridge.

So, total distance = 400 m +100 m = 500 m

Time = 30 seconds

Speed = $\frac{distance}{Time}$

Speed = $\frac{500}{30}$

Speed = $\frac{50}{3}m/s$

Speed in km/hr = $\frac{50}{3}\times \frac{18}{5} = 60 km/hr$

Hence the speed of the train is 60 km/hr.