EasyMath· Problem-Solving and Data Analysis· Ratios, rates, proportional relationships, and units· MCQ
For a person m miles from a flash of lightning, the length of the time interval from the moment the person sees the lightning to the moment the person hears the thunder is k seconds. The ratio of m to k can be estimated to be 1 to 5. According to this estimate, the person is how many miles from a flash of lightning if the time interval is 25 seconds?
A
10
B
9
C
6
D
5
Correct answer: D
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Explanation
Choice D is correct. It’s given that the ratio of m to k is estimated to be 1 to 5. Therefore, when , the relationship between these ratios can be expressed by the proportion . Multiplying both sides of this equation by 25 yields .
Choices A, B, and C are incorrect and may result from calculation errors.
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id cb_question_bank:0705e99a-db61-48fa-a4e5-ec3eecb3f97f · question 3f5398a6 · IBN 029322-DC
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