If the partial pressure of water vapour at 27°C is 18 mm Hg and the saturated vapour pressure of the atmosphere at the same temperature is 24 mm Hg, the relative humidity at this temperature is?
A
25%
B
33%
C
75%
D
82%
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Relative
Humidity = (S.V.P. of water at dew point)/S.V.P of water at air temperature =(18)/24 x 100% = 75%
Source: WAEC / JAMB / NECO Classroom Archive (Record #14043)