Earthen pitchers are more effective in Hyderabad than in Chennai. Justify.

Explanation

The rate of evaporation of water depends upon humidity (moisture present in stmosphere). The more is the humidity the less is the rate of evaporation. In coastal areas like Chennai moisture is more and hance the rate of evaporation of water is less. In case of non-coastal area like Hyderabad, moisture is less and hence the rate of evaporation is more. Therefore a higher rate of evaporation allows faster cooling of water in the earth pither in Hyderabad when compared to the earthen pitcher in Chennai.