Saturday

August 23, 2014

August 23, 2014

Posted by **ALISON** on Saturday, September 17, 2011 at 10:42pm.

- trig -
**Steve**, Wednesday, September 21, 2011 at 12:44pmThe wiper covers 60 deg, or 1/6 of a circle. The area of a circle is πr^2. So, the area of a 10" circle is 100π. But we have to subtract the area of a 1" circle, since the rubber does not cover the inside inch. That would be π. So, a whole 10" circle minus a 1" circle would be 99π. But we only have 1/6 of that, or 16.5π = 51.8 sq. in.

**Related Questions**

trig - A rear windshield wiper on a car has a total arm length of 10 inches and ...

trig - A rear windshield wiper on a car has a total arm length of 10 inches and ...

pprecalc - a windshield wiper on a a plymouth acclaim is 20 in. long and has a ...

physics - The blade of a windshield wiper moves through an angle of 90.0° in 0....

PHYSICS - The blade of a windshield wiper moves through an angle of 90.0° in 0....

PHYSICS - Given: the linear expansion coefficient of glass is 9 x 10^-6 ('C)^-1...

PHYSICS - Given: the linear expansion coefficient of glass is 9 x 10^-6 ('C)^-1...

physics - Given: the linear expansion coefficient of glass is 9 x 10^-6 ('C)^-1...

physics - thanks again to anyone who can possibly help!!!!! i wish i had a book ...

Physics - A lawn mower has a flat, rod-shaped steel blade that rotates about its...