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A boat goes a certain distance at 40 km/...

A boat goes a certain distance at 40 km/h and comes back the same distance at 24 km/h. What is the average speed for the total journey?
(A) 32 km/h (B) 28 km/h (C) 34 km/h (D) 30 km/h

A

B

B

C

C

D

D

A

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