Question

3. Express each of the following in ms-
(b) 18 km min-1​

Answer 1

this This may help you I think you asked this question only na

1 km= 1000m.

1h=60min

=60×60 s

1hr=3600s

1min=60 s

a)1km/h=1×1000 m(1000 cancel and it's become 5)

3600s

=18

=5/18m/s=0.278m/s

b)18km/min=18×1000m

60 s

(18 cancel and it becomes3 from 1000 1:zero will cancel from 60 is also cancel it becomes 1)