Draw a diagram. Clearly, the cow can graze 3/4 of a circle of radius 20m
So, the area is 3/4 * πr^2 = 300π m^2
A cow is tethered by a piece of rope 50 meters long to the side of a rectangular barn. The rope is fastened to a hook (on the barn) that is located 20 meters from the corner along the longest side of the barn which measures 70 meters by 20 meters. Over how much ground (outside of the barn) can the cow graze? Please shiwnwork
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