# Inter physics A motor vechicle travelled the first third of a distance s at speed of v1=10kmph,the second third at a speed of v2=20kmph and the last third at a speed of v3=60kmph.Determine the mean speed of the vechicle over the centire distance s.

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• K L'Heureux May 11, 2010

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Mean speed= (v1*s+v2*s+v3*s)/(3*s)
therefore mean speed=30kmph

Posted on Jun 06, 2008

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It should be about 40-50kmph that is the ballpark figure. (and a reasonable answer)

Posted on Jun 03, 2008

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