Answer:
v = 0.834 m/s or 3 km/h
Step-by-step explanation:
Given that,
Distance between house and playground is 300 meters
If you went 300 metres away in 10 minutes and ran back and reached in 2 minutes, it means total distance covered by you during whole journey is 300 m + 300 m = 600 m
Total time, t = 10 min + 2 min = 12 min = 720 seconds
Total distance covered divided by total time gives average speed. So,
[tex]v=\dfrac{600\ m}{720\ s}\\\\v=0.834\ m/s[/tex]
or
v = 3 km/h
So, the average speed is 0.834 m/s or 3 km/h.
