A storm dropped 5 inches of rain in the first thirty minutes.  In the next 30 minutes, the hurricane dropped half that amount of rain.  It then dropped 1/2 inch of rain for the next hour.  What was the average rainfall total for the duration of the storm?
How many inches did the storm drop in the first 30 minutes? ** The storm dropped 5 inches then half that amount so 5/2 = <<5/2=2.5>>2.5 inches
How many inches did the storm drop in the next hour? ** The next hour the storm dropped 1/2 inch of rain for 1 hour so 1*.5 = <<1*.5=.5>>.5 inches
How many inches did the storm drop in total? ** All total the storm dropped 5 inches + 2.5 inches + .5 inch for = <<5+2.5+.5=8>>8 inches
How many inches of rain did the storm drop in total? ** It rained for 2 hours total so 8/2 = <<8/2=4>>4 inches of rain per hour
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