Question 325669: A boy cycles x km at y km per hour and p km at q km per hour.Find his average speed for the whole journey. Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! A boy cycles x km at y km per hour and p km at q km per hour.Find his average speed for the whole journey.
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time taken = x/y
also
time taken = p/q
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Total time = x/y + p/q
= xq+py /qy
Total distance = x+p km
Average speed = total distance / total time
x+p / xq+py/qy
(x+p)*qy/ (xq+py)km/hour
