Modded SAT Question Bank
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Test
Math
Domain
Problem-Solving and Data Analysis
Skill
Ratios, rates, proportional relationships, and units
Difficulty
Medium
ID: 8917ce38
Modded SAT Question Bank by Abdullah Mallik

Which of the following speeds is equivalent to 90 kilometers per hour? (1 kilometer = 1,000 meters)

  1. 25 meters per second

  2. 32 meters per second

  3. 250 meters per second

  4. 324 meters per second

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Correct Answer: A
Rationale

Choice A is correct. Since 1 kilometer is equal to 1,000 meters, it follows that 90 kilometers is equal to 90 times 1,000, equals 90,000 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 60 times 60, equals 3,600 seconds. Now the fraction 90 kilometers over 1 hour is equal to the fraction 90,000 meters over 3,600 seconds, which reduces to the fraction 25 meters over 1 second or 25 meters per second.

Choices B, C, and D are incorrect and may result from conceptual or calculation errors.

 

Question Difficulty: Medium
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