Question

Juan rides his motorcycle 108 km in 1 and 1/2 hours what is his average speed in kph(kilometers per hour)

Answer 1

We know, speed = distance / time
distance = 108 km
speed = 1 1/2 = 3/2 hours

Substitute their values, 
s = 108 / 3/2
s = 108 * 2 / 3
s = 72

In short, Your Answer would be 72 Km/h

Hope this helps!

Answer 2

108 divided by 1.5 
=72kph