A firefighter's hose can deliver 20 gallons of water per minute.  For a building fire that requires 4000 gallons of water to put out, how long will it take, in minutes, for a team of 5 firefighters, each with their own hose, to put out the fire?
How many gallons of water can a team of 5 firefighters with hoses deliver? ** A team of 5 firefighters with hoses can deliver 5 * 20 = <<5*20=100>>100 gallons of water per minute.
How long will it take this team to extinguish the fire? ** To deliver 4000 gallons, this team will take 4000/100 = <<4000/100=40>>40 minutes to extinguish the fire.
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