The Zamboni is an ice resurfacer invented by Frank Zamboni in the year 1949 to clean and resurface the ice in skating rinks. A Zamboni takes 20 minutes to resurface an Olympic-sized skating rink. What is the minimum number of Zambonis working together at the same rate that could resurface an Olympicsized skating rink in 5 minutes or less?

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Problem Understanding: Understand the problem. We need to find the minimum number of Zambonis that can resurface the ice in 5 minutes or less, given that one Zamboni takes 20 minutes to do the job alone.Comparison of Speed: Determine how many times faster the team of Zambonis needs to be compared to a single Zamboni. A single Zamboni takes 20 minutes, so to do it in 5 minutes or less, the team must work 4 times faster (20 minutes / 5 minutes = 4).Number of Zambonis Needed: Calculate the number of Zambonis needed. If one Zamboni takes 20 minutes, then to be 4 times faster, we need 4 Zambonis working together (1 Zamboni * 4 = 4 Zambonis).

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