A body covers one third of its journey with speed u, next one third with speed v and the last with speed w. Calculate the average speed for entire journey. (please mention full equation!!)
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We take the distance as '3x', so one-third distance will be 'x'. We derive time of each 'x' distance with the formula: t=d/s. We then put the values in the formula of average speed: total distance/ total time
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