Answers

2014-06-24T19:12:44+05:30
The  average speed is 25kmph

0
Let distance = x

Total Distance = x + x = 2x

Time = x / 20 + x/ 30 = 5x / 60

Average Speed = Total Distance / Total Time

2x / (5x /60) = 2x * 60 / 5x = 25 km / hr
thank u
2014-06-24T19:13:42+05:30
In general A+B/2=average
 
    therefore 30+20/2=50/2=25 km./hr.


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