Answer:
Therefore the area of the screen cleared is 1414.28 cm².
Step-by-step explanation:
Given:
a windscreen wiper of a vehicle of length 30 cm
Consider this length as Radius of Semicircle, r = 30 cm
clears out an angle of 180 degrees implies Semicircle Shape
pie=22/7
To Find:
Area of the screen cleared
= ?
Solution:
We have
[tex]\textrm{Area of Semicircle}=\frac{1}{2}\pi(radius)^{2}[/tex]
Substituting r and pie we get
[tex]\textrm{Area of Semicircle}=\frac{1}{2}\times \frac{22}{7}(30)^{2}=1414.28\ cm^{2}[/tex]
Therefore the area of the screen cleared is 1414.28 cm².