The minimum daily temperature at a mountain village was recorded to the nearest 0.5°C on 200 consecutive days. The results are grouped into a frequency table and a histogram is drawn.

The temperatures ranged from 0.5°C to 2°C on n days, and this class is represented by a column of height hcm.

The temperatures ranged from –2.5 to –0.5°C on d days. Find, in terms of n, h and d, the height of the column that represents these temperatures.