Excellent! As is clear from the diagram, Vessel C is broadest at the top. So, the surface area of the exposed water is the largest in Vessel C. So, its evaporation will be the fastest.
Air humidity measures how much water vapour is already in the air. For example, if we are near the sea, the humidity is higher there, as water from the sea keeps evaporating.

Imagine you have two identical glasses of water. You place one glass of water on a beach, and the other in a desert. The temperatures and wind speeds at both places is the same.
Which glass will experience a faster rate of evaporation?
  • The desert glass
  • The beach glass
  • Both will have the same rates of evaporation
  • Depends on the shape of the glass