GATE CE 2017 CE-2 Q47: Hydrology

A catchment is idealized as a 25 km × 25 km square. It has five rain gauges, one at each corner and one at the center, as shown in the figure.

During a month, the precipitation at these gauges is measured as

mm,

mm and

mm. The average precipitation (in mm, up to one decimal place) over the catchment during this month by using the Thiessen polygon method is

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