Ericagabonadaid
Answered

a windshield wiper blade is 18 inches long.to the nearest square inch,what is the are covered by the blade as it rotates through all angle of 122degree?

Sagot :

Mlcparra16id
Here, we are looking for the area of the sector covered by the wiper. 

[tex]A_{sector}= \frac{xdegrees}{360degrees} * \pi r^2\\= \frac{122}{360} *(3.14)18^2\\=0.34*1017.36\\=345.0924[/tex]

It covers approximately 345 sq. inches.