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Compare the approximate speed per hour of Boat A to Boat B.

0+11+19+28+32 = 90 total knots
1+4+6+8+9 = 28 total hours
90÷28 = 3.2

11+19+27+36+39 = 132 total knots
2+4+6+8+9 = 29 total hours
132÷29 = 4.6

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