Mud Creek has the watershed boundaries shown in Fig. There are six rain gages in and near the watershed, and the amount of rainfall at each one during a storm is given in the accompanying table. Using the Thiessen method and a scale of 1 in. = 10 mi, determine the mean rainfall of the given storm.
Gage NumberRainfall (cm)
1 ............................... 5.5
2 ............................... 4.5
3 ............................... 4.0
4 ............................... 6.2
5 ............................... 7.0
6 ............................... 2.1

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10 mi