Question

Annabelle 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

speed= d/t
=400/30=1.33m/second

Answer 2

Answer:

60 km/hr

Step-by-step explanation:

Length of train = 100 m

Length of bridge = 400 m

Total distance traveled by train = 100+400 = 500 m

Time taken = 30 seconds

So, $Speed = \frac{Distance}{Speed}$

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

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

$Speed = \frac{500}{30}m/s$

So, Speed in km/hr = $\frac{500}{30}\times \frac{18}{5} =60 km/hr$

Hence the train is going at a speed of 60 km/hr.