Question

25 m/s to km/h
108 km/h to m/s
60 km/h to cm/min

Answer 1

To convert m/s in kilometre per hour we have to multiply 25 into 18 by 5
so
25*18/5=90kmp/h
to convert kilometre per hour into metres per second we have to multiply 108
into 5 by 18
so
108*5/18=30m/s

HOPE IT HELPS☺☺

Answer 2

25 m/s to km /h

In 1 km there are 1000m
In 1 hour there are 3600 s

$distance = \frac{25}{1000} \\ time = \frac{1}{3600} \\ \frac{25}{1000} \div \frac{1}{3600} \\ \\ \frac{25}{1000} \times \frac{3600}{1} \\ 90 \: kmh {}^{ - 1}$

108 ×1000/3600
30 m/s

60 km/h

60×100000/60
100000cm/ min