In the calorimeter where there was water at a temperature of 0 degrees, 10 kg of water vapor with a temperature

In the calorimeter where there was water at a temperature of 0 degrees, 10 kg of water vapor with a temperature of 100 degrees was admitted in the calomiter, the temperature was set at 60 degrees. What was the mass of water?

Since the water was at a temperature of 0 degrees and steam at a temperature of 100 degrees, then since the temperature was set to 60, the ratio of the initial mass to the steam was 6/4, the initial mass was 15 kg and 25 kg of water was obtained.
Answer 25