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Trains Boats and Streams Practice Test 4 with solutions

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Question : 1

Total: 40

A motorist covers a distance of 39 km in 45 minutes, by moving at a speed of x km/hr for the first 15 minutes, then moving at double the speed for the next 20 minutes and then again moving at his original speed for the rest of journey. Then x is equal to :

31.2
36
40
52

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