Sarafina E.

asked • 09/14/23

An engineer is asked to design a water sprinkler that will cover a field of 100m2 that is in the shape of a sector of a circle of radius 15cm. Calculate:

An engineer is asked to design a water sprinkler that will cover a field of 100m2 that is in the shape of a sector of a circle of radius 15cm. Calculate: i) the angle through which the sprinkler rotate. [3] ii) the arc length of field (sector of a circle). [2]

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Patrick F. answered • 09/14/23

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Sarafina E.

If my radius is in cm, when I convert it to meters or convert the area to cm, am I not supposed to get the same answer for the angle?
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09/14/23

Patrick F.

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No. A radius of 15 cm is about the size of a half of a ruler. That doesn't make sense for a field.
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09/14/23

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