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A school janitor has mopped 1/3 of a classroom in 5 minutes. At what rate is he mopping?

A school janitor has mopped 1/3 of a classroom in 5 minutes. At what rate is he mopping?
Simplify your answer and write it as a proper fraction, mixed number, or whole number.

Answer

Rate of mopping: To find the rate, divide the fraction of the classroom mopped by the time taken.

  1. Fraction of classroom mopped: 1/3
  2. Time taken: 5 minutes
  3. Rate = 1/3 ÷ 5 = 1/3 × 1/5 = 1/15

The janitor is mopping at a rate of 1/15 classrooms per minute.

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