circumference = π d (pi x diameter)
= 1256.6 feet
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300 by 400 feet is two and three-quarters acres
121,92 meter
First we have to find the radius: pi*radius2 = 400*pi square meters Divide both sides by pi and then square root both sides: radius = 20 meters 2*pi*radius or pi*diameter = circumference 2*pi*20 = 40*pi meters
Surface area of a sphere = 4*pi*radius2 Area = 4*pi*102 = 400*pi square feet Amount needed in gallons = (400*pi)/400 = pi (3.141592654) Just over 3 gallons will be needed.
400 by 400 feet = 160,000 square feet 160,000 square feet = 3.6730946 acres