Dert Rescuer (DR) Everyday Science MCQs Fire & Dert Rescuer (FDR) Rescue 1122 A Human can hear sounds upto: June 22, 2022 Admin No Comments A: 20 Hz to 20,000 Hz B: 10 Hz to 5000 Hz C: 30 Hz to 30,000 Hz D: None of these Correct Answer: a Short Details: Unit of Frequency is Hertz View More Details >>
