Question

Annabelle is taking the Polar Express ALL the way to the North Pole! The Polar Express is 100 meters long and it takes 30 seconds to cross Santa’s 400m ice bridge. What speed is the train going at?

Answer 1

Given that, the length of Polar Express = 100 m
Also the length of Santa's bridge = 400 m
So total distance = 400 + 100 = 500 m = 500 / 1000 = 0.5 km
Time = t = 30 seconds = 30 / 3600 = 0.0083 hours
Speed of the train = ?
Solution:
We know that,
Speed = Distance / Time
Speed = 0.5 / 0.0083
Speed = 60.2 km/h
which is the answer.
Hopefully it helps. Thanks.