It is given that the average speed of a subway train is 72 km/h.

At this average speed, how far does it travel in 12 minutes?

14.4 km

Step-by-step explanation:

First convert hours to minutes, 72km/60m.

72/60=x/12

864=60x

864/60=60/60x

14.4=x

Therefore, the subway train will travel 14.4 km in 12 minutes.

14.4km

Step-by-step explanation:

Average speed = distance/time

Given speed = 72km/h and

Time = 12minutes

Convert the time to hour

12mins = 12/60 = 0.2hour

Therefore

72 = distance/0.2

Cross multiply

Distance = 72 x 0.2

= 14.4km

It travels 14.4km in 12 mins