Average speed
Question asked by: ego2006
Asked on: 30 Sep 2009
You need to use speed = distance / time to work out questions like this, just put in the numbers that you have making sure that the units are consistent, of course, and then work out the answer.
By: knowitall
Replied at: 11 Oct 2009
Average rating for this answer is 1 / 5
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The speed is same in both the cases. Suppose, distance=S, total time=t and speed=v.
Then, S=55*t/2+90*t/2=145t/2
Now, speed=S/t=(145t/2)/t=72.5km/hr.
By: psahu63
Date of comment: Thu, Sep 2nd 2010
Comments and other answers:
The speed is same in both the cases. Suppose, distance=S, total time=t and speed=v.
Then, S=55*t/2+90*t/2=145t/2
Now, speed=S/t=(145t/2)/t=72.5km/hr.By: psahu63
Date of comment: Thu, Sep 2nd 2010
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speed average
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