Answer:
40.3โC
Explanation:
At planet B;
Water boils = 180โC
Water freezes = 50โC
In this planet the temperature difference = 180 - 50 = 130 compared to earth where the temperature difference is; 100 - 0 = 100
This means;
130 โC = 100 โC
x โC = 31 โC
x = 31 * 130 / 100
x = 40.3โC