Answer:
The average speed of Byun is, 3.6 km/h
Step-by-step explanation:
Given data,
The distance walked by Byun, d = 15 block
Let 1 block be 100 m
Therefore total distance walked by Byun, d = 1.5 km
The period of travel t = 25 minutes
t = 0.42 h
Therefore, the average speed of Byun,
s = d / t
= 1.5 km/ 0.42 h
= 3.6 km/h
Hence, the average speed of Byun is, 3.6 km/h