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#30228 Bangla Language & Literature Ratio Proportion and Partnership Level 0

The 20"-diameter wheels of a car rotates at rate of 24 revolutions per minute, while the 30"-diameter wheels of another car travels at a rate of 18 revolutions per minute. What is the ratio of the speed of the second car to that of the first?

  1. A 1 : 1
  2. B 4 : 3
  3. C 6 : 5
  4. D 9 : 8
Answer: D - 9 : 8

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