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Mathematics 20 Online
OpenStudy (anonymous):

A water sprinkler sprays water over a distance of 30 feet while rotating through an angle of 135° . What area of lawn receives water?

OpenStudy (ranga):

Radius = 30 feet. Calculate the area of the circle with radius 30 feet. If the sprinkler rotated 360 degrees it will spray an entire circle and that will cover the area calculated above. If the sprinkler rotated only 135 degrees, then it will cover only 135/360 of the circle.

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