2. Free-Evaporation measurements The standard US Class A evaporation pan has an inside diameter of 47.5 inches and a depth of 10 inches. 

a. Calculate the surface area of water in the pan in square meters.

b. Calculate the volume of the pan in cubic meters. 

c. If the initial volume of water in the pan is 11.5 US gallons, what is the depth of the water in millimeters? 

d. If after a 24 hour period with no precipitation the volume of water in the pan is measured and found to be 10.2 US gallons, what is the evaporation rate in millimeters/days? 

e. What would be the depth of water in millimeters?

f. During the succeeding day there was a 3 hour period of precipitation at a constant rate of 5mm/hour. Assuming that the 24 hours evaporation rate calculated in (d) also occurs during this 24 hour period, what would be the depth of water in the pan? 

g. If there is no further rain, and no water is added to the pan, how long would it take for the water in the pan to totally evaporate, using the constant 24 hour evaporation rate of step (d)?