Multiple choice general knowledge science & technology

Which one is not a valid RPM(rotations per minute) value for Hard Disk Drives

  1. 7200

  2. 8700

  3. 5400

  4. 10000

  5. 15000

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Standard HDD RPM speeds are 5400, 7200, 10000, and 15000 RPM. 8700 RPM is not a standard commercial hard drive speed and would be an unusual or non-existent specification in the market.