Firefighter Math · Question
An air cylinder provides 45 minutes of air. If a firefighter uses 2/3 of the air, how many minutes of air are remaining?
If 2/3 of the air is used, then 1 - 2/3 = 1/3 of the air is remaining. Calculate 1/3 of the total air time: (1/3) * 45 minutes = 15 minutes.
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Question: An air cylinder provides 45 minutes of air. If a firefighter uses 2/3 of the air, how many minutes of air are remaining?
Answer options: ✅ 15 minutes
- 20 minutes
- 30 minutes
- 25 minutes
Correct answer: 15 minutes
Explanation: If 2/3 of the air is used, then 1 - 2/3 = 1/3 of the air is remaining. Calculate 1/3 of the total air time: (1/3) * 45 minutes = 15 minutes.
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