Question

Constant speed of a train is 18 kmh-1 what is its speed in unit ms-1? 
(A) 15 ms-1
(B) 5 ms-1
(C) 10 ms-1
(D) 90 ms-1​

Answer 1

Answer:

18km =18000m

1 hour =60×60=3600seconds

speed of train = 18000/3600

= 5ms*-1