*(j) A car travels x km/h for p km and makes
another journey at y km/h for q km.
what is the formula for the average speed? plz explain
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Step-by-step explanation:
total distance = p+q km
time 1 = p/x hour
time 2= q/y hour
hence total time = p/x+q/y
there fore average speed = total distance / total time
= (p+q) / (p/x+q/y) km/hour
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