A car traveled 300 meters from point A to point B at a speed of 6 meter per second. Then it took the same route and came back to point A at a speed of 2 meter per second. What is its average speed?
Select the correct option:
A) 2m/s
B) 3m/s
C) 4m/s
D) 5m/s
E) 6m/s
Since the distance traveled is same, we can apply direct formula= 2XS1XS2/(S1+S2)   2X6X2/8= 3. '3m/s' is the answer.
<result>B</result>
A car traveled 300 meters from point A to point B at a speed of 6 meter per second. Then it took the same route and came back to point A at a speed of 2 meter per second. What is its average speed?