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A man travels from A to B at 4 mph over a certain journey
and returns over the same route to A, at 5 mph. What is his
average speed for the journey?
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Answer Posted / raviraj mishra
FORMULA FOR AVG. SPEED WHEN DISTANCE TRAVELLED IN TWO
INTERVALS IS SAME , IS GIVEN BY = 2*A*B/A+B
, A=4mph & B=5MPH SO ANSWER=4.44mph
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