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A man jogs at 6 mph over a certain journey and walks over the same route at 4 mph. What is his average speed for the journey?
(a) 2.4 mph (b) 4 mph (c) 4.8 mph (d) 5 mph
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- x=6km
y=4km
avg speed is 2xy/(x+y)=48/10=4.8
ans is 4.8 - 13 years agoHelpfull: Yes(3) No(0)
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