One wheel has a diameter of 30 inches and a second wheel has a diameter of 20 inches. The first wheel travels certain distance revolution in 240 revolutions. In how many revolutions did the second wheel travel the same distance?
Correct answer: C. 360
- A. 170
- B. 160
- C. 360
- D. 420
Explanation
The ratio of diameters is 30:20=3:2.The circumferences are also in the same ratio of diameters.The first wheel travels the distance in 240 revolutions.So the second wheel travels the same distance in 240×3/2=360 Revolutions.
This question appeared on the HEC Phase I 2017 paper, which you can sit online with every answer explained.
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