Question by arvan - Discuss with MathYouLike

arvan

28/07/2020 at 07:25

There are 4 gear wheels on fixed axles next to each other, as shown. The first one has 30 gears, the second one 15, the third one 60 and the last one 10. How many revolutions does the last gearwheel make when the first one turns through one revolution?

(A) 3 (B) 4 (C) 6 (D) 8 (E) 9

List of answers

huynh anh phuong 29/07/2020 at 14:14

The ratio of the 1st gear and the 4th gear is : 3:1

So the last one will rotate: 1 * 3 = 3 ( revolutions )

Choose A

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