Question

Why rate of evaporation increases by increasing surface area ?

Answer 1

Evaporation rates depend on a number of things: surface area of the liquid-air ... humidity and increases the evaporation rate by increasing the air flow

Answer 2

evaporation occurs when molecules get enough energy from heat to escape the liquid.They get this heat from motion and the air.An increased surface area means that more liquid will be exposed to air at one time,and therefore,more water can evaporate in a given time period.