Question

with the help of activity show that rate of evaporation increases with the increase with surface area

Answer 1

When we put our clothes for drying, we spread them so as to decrease the time taken to let it dry, so when we increase the surface area, the rate of evaporation increases and time taken decreases as evaporation is a surface phenomenon.

Answer 2

When we put our clothes for drying, we spread them so as to decrease the time taken to let it dry, so when we increase the surface area, the rate of evaporation increases and time taken decreases as evaporation is a surface phenomenon.
this shows that the rate of evaporation increases with increase in surface area 
and another example is when water is spilt on floor we use a wiper to spread it so that the water can evaporate easily