Answer:
175 square inches
Step-by-step explanation:
Area wiped by the wiper blade = Area covered by the whole wiper mechanism - Area that is not being wiped.
Where area of a sector of 125°....Area = 1/2.r^2.theta....but with theta in radians
Area covered of the whole wiper mechanism;
= 1/2 × 25^2 × (25pi/36)...in which (25pi/36) is 125° in radians..
=217.014pi
Area that is not being wiped;
= 1/2 × (25 - 14)^2 × (25pi/36)
= 42.014pi
Area wiped by the wiper blade
217.014 - 42.014
Area = 175 square inches
