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30-08-2019
Mathematics

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The following picture shows two gears meshed together with the arrows lined up. Gear A has 48 teeth, while gear B has 28 teeth. Suppose the gears begin turning. How many complete revolutions would gear B need to make before the arrows are lined up again?

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tramserran tramserran

30-08-2019

Answer: 12

Step-by-step explanation:

The LCM of 48 and 28 is 336

It would take 336 ÷ 28 = 12 revolutions of gear B

and 336 ÷ 48 = 7 revolutions of gear A

to match up the arrows.

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