Question

the speed of the car is 30kmper hour express its speed in m per secs

Answer 1

30 km/hr
=30×1000/3600 m/s
=30×5/18 m/s
=150/18 m/s
=25/3 m/s
=8.33 m/s

Answer 2

speed = 30km/hr

to convert km/hr to m/s we need to multiply the value by 5/18

30 x 5/18

=150/18

= 8.33 m/s
-----------------------------------------------------------------
to convert m/s to km/hr we need to multiply by 18/5