Multiple choice general knowledge

A cough releases an explosive charge of air that moves at speeds up to -- mph.

  1. 40

  2. 60

  3. 20

  4. 30

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

A cough can expel air at speeds up to 60 mph (approximately 96 km/h). The force of a cough is generated by the diaphragm and respiratory muscles suddenly contracting to expel irritants. This high velocity helps clear the airways effectively.