Question

Christina can paint 420 square feet in 105 minutes. Which unit rate describes the scenario?

4 square feet per minute
square foot per minute
1 square foot per 4 minutes
1 square foot per minute

Answer 1

divide total sq ft x total minutes to get square feet per minute

420/105 = 4

so 4 sq ft per minute

Answer 2

You've gotta find the least common variable. both of these can be divided by 105. 420 divided by 105 is 4. 105 divided by 105 if 1. there are 4 square feet for every minute. The answer is A.