The sprinkler covers the quarter area of a circle whose radius is 10.5 m.
The area of the quarter of circle is,
Substitute the value of r in the equation to obtain the value area of lawn watered by sprinkler.
So answer of a part is 85.590 meter square.
(b)
The sprinkler water travel a distance of 10.5 m from the sprinkler. So answer of b part is 10.5m.
(c)
The distance of edge araound the water area is equal to the circumferencr of quarter circel.
The formula for the circumference of quarter circle is,
Substitute the value of r in the equation to obtain the distance around the edge of watered area.
So answer of C part is 16.493 meters.