Telangana Police SI 2018 · Question 23 of 96

Directions: The table gives heat index h = h(T, H) for temperature T (F) and humidity H (%). When the temperature is 98 F, the average rate of change of the heat index with humidity is:

Data Interpretation

A1.4
B1.50
C1.075Correct
D1.75

Answer: C. 1.075

Explanation

At T=98: h = 114, 123, 133, 144, 157 for H = 50, 60, 70, 80, 90. Rates per unit humidity: 9/10=0.9, 10/10=1.0, 11/10=1.1, 13/10=1.3. Average = (0.9+1.0+1.1+1.3)/4 = 4.3/4 = 1.075.

Source: TSLPRB SCT SI Civil PWT 2018 official paper (Arithmetic & Test of Reasoning); answer verified by worked solution

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