What decimal part of an hour is one second?
Aptitude
Decimal Fraction
Difficulty: Easy
Choose an option
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A0.000277...
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B0.000278
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C0.0000277
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D0.002777
Answer
Correct Answer: 0.000277...
Explanation
Problem restatementConvert 1 second into the decimal fraction of 1 hour.
Given data
- 1 hour = 60 minutes = 3600 seconds.
Concept/ApproachExpress 1 second as a fraction of 1 hour, then write that fraction in decimal form.
Step-by-Step calculation Fraction of an hour = 1 second / 3600 seconds = 1/3600 Decimal = 1 ÷ 3600 = 0.000277...
Verification/AlternativeSince 1/36 = 0.027777..., dividing by 100 gives 0.00027777... (7 repeats).
Common pitfalls
- Using 1/60 (minutes) instead of 1/3600 (seconds).
Final Answer0.000277...