Answer: It traveled 0.06172 km.
Step-by-step explanation:
Given: Speed of block = 4 m/s
Time taken by block = 15.43 s
To calculate: Distance covered by it in km.
We know that,
[tex]Distance = speed \times time[/tex]
So distance covered by block = [tex]4\times15.43[/tex]
= [tex]61.72\ m[/tex]
Since 1 kilometer = 1000 meters.
So,
[tex]61.72\ m=\dfrac{61.72}{1000}\ km=0.06172\ km[/tex]
Hence, it traveled 0.06172 km.