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Alex17521 [72]
3 years ago
8

A strawberry farmer needs to water a strawberry patch of 1500 square yards is in the shape of a sector of a circle with a radius

of 40 yards. Through what angle should the sprinkler rotate
Mathematics
1 answer:
Anna007 [38]3 years ago
6 0

Answer:

The sprinkler must rotate by an angle of 107.48°.

Step-by-step explanation:

Given:

Area of strawberry patch( in shape of sector)  = 1500 square yards

Radius of circle = 40 yards

To find angle through which the sprinkler should rotate.

Solution.

In order to find the angle of rotation of sprinkler, we will apply the area of sector formula.

Area\ of\ sector\ = \frac{\theta}{360}\times \pi r^2

where \theta is the angle of the sector formed and r is radius of the circle.

Thus, we can plugin the given values to find \theta which would be the angle of rotation.

1500 = \frac{\theta}{360}\times \pi (40)^2

Taking \pi=3.14

1500 = \frac{\theta}{360}\times \ (3.14) (40)^2

1500 = \frac{\theta}{360}\times 5024

Dividing both sides by 5024.

\frac{1500}{5024} = \frac{\theta}{360}\times 5024\div 5024

Multiplying both sides by 360.

\frac{1500\times 360}{5024} =\frac{\theta}{360}\times 360

107.48=\theta

∴ \theta= 107.48\°

Angle of rotation of sprinkler = 107.48°

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