At 3:15 pm, a metal ball has a temperature 80°F is taken outside where the air temperature is 20°F. At 3:18 pm, the temperature of the metal ball is 42°F. Later, the metal ball is brought inside where the air is at 80°F. At 3:25 pm, the reading is 71°F. When was the metal ball brought indoors? Write the exact time.

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