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Question 1
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Three cities A, B, C are equidistant from each other. A motorist travels from A to B at 30km/hour, from B to C at $40$ km/hour, and from C to A at 50km/hour. Then the average speed is
A.
39km/hour
B.
40km/hour
C.
38.3 km/hour
D.
37.6km/hour
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