Question

convert 18 km/h into m/s

Answer 1

multiply by 5/18
18×5/18
5 m/sec is answer

Answer 2

let me tell u trick :

to convert km\h in m\s :

MULTIPLY THAT NO. WITH 5\18.

and for m\s into km\h:

MULTIPLY THAT NO. WITH 18\5

so for your answer we do

18*5/18= 5m\s