What decimal part of an hour is one second?

Aptitude Decimal Fraction Difficulty: Easy
Choose an option
  • A
    0.000277...
  • B
    0.000278
  • C
    0.0000277
  • D
    0.002777

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...

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