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Ratios, rates, proportional relationships, and units SAT question
Math · Problem-Solving and Data Analysis · Medium · Answer it here, explanation included.
Which of the following speeds is equivalent to 90 kilometers per hour? (1 kilometer = 1,000 meters)
ExplanationShow
Choice A is correct. Since 1 kilometer is equal to 1,000 meters, it follows that 90 kilometers is equal to 
meters. Since 1 hour is equal to 60 minutes and 1 minute is equal to 60 seconds, it follows that 1 hour is equal to 
seconds. Now 
is equal to 
, which reduces to 
or 25 meters per second.
Choices B, C, and D are incorrect and may result from conceptual or calculation errors.
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