There is a lot of dust in Susie's house. It takes her 2 hours to vacuum the whole house. She can vacuum each room in 20 minutes. How many rooms does she have in her house?
How many minutes does it take her to vacuum the whole house? ** Susie spends 2*60 = <<2*60=120>>120 minutes vacuuming.
How many rooms does she have in her house? ** Since she can vacuum each room in 20 minutes, she has 120/20 = <<120/20=6>>6 rooms in her house.
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