A water sprinkler covers 90 degrees of a backyard lawn. How many TIMES will the sprinkler need to be moved in order to cover the FULL 360 degrees of entire lawn?
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Water sprinkler covers - 90 degrees
Water sprinkler needs to cover - 360 degrees
No. of times sprinkler need to cover the entire lawn = 360/9=4
Thus, the sprinkler needs rotate 4 times
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