Question

mia in a train notices that she can count 41 telephone posts in 1 minute. If they are known to be 50 metres apart,then at what speed is the train travelling?

Answer 1

total number of posts = 41
distance between each post = 50 m
so total distance of the posts = 41 × 50 = 2050
now this distance is covered in 1 min.
so the speed of train = 2050/1 = 2050 m/min
= 2050/60 m/sec = 205/6 m/min
= 34.16 m/sec

Answer 2

speed=distance÷time
time =distance÷speed