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A building conducts a fire drill. On average a person takes 2.4 minutes to walk down...

A building conducts a fire drill. On average a person takes 2.4 minutes to walk down the stairs and exit the building. It takes 1.5 minutes before the first person leaves the building and then people leave at the rate of 80 per minute. How many minutes does it take to evacuate 600 people from the building?

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Answer #1

Given data:

Average time taken per person to evacuate is 2.4 minutes

Initial time needed before first person evacuates is 1.5 minutes

Average rate of evacuation is 80 persons/minute

Total time taken to evacuate 600 persons = Initial time + time taken by 600 persons to evacute

As we know 80 persons evacuate in a minute, so 600 persons evacuate in i.e. 7.5 minutes

Thus total time needed to evacuate = 1.5 + 7. 5 = 9 minutes

Thus, 9 minutes are required to evacuate all 600 people

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