...a).

**l**= .16296,**r**= 12.587. (b).**l**= 1.3672,**r**= 1.2978. 5. Given the length of the arc**l**and the angle a which it subtends at..., the radius to the center line of the track being 2100 feet. If the...4 Answers · Science & Mathematics · 25/06/2008

... at least get you down the right track ! I hope you don't mind the...circle perimeter (circumference) = 2·π· r semicircle perimeter = circumference / 2 = (2·... top where circle is): 2· L + W = 2· L + (2· r ) area...

2 Answers · Science & Mathematics · 07/05/2008

400 = 2.54 + 2 pi

**R**+ 0.6pi 397.46 = 2 pi**R**+ 0.6 pi 397.46 = 2 pi**R**+ 1.885 395.58 = 2 pi**R**395.58 = 6.28318**R R**= 395.58 / 6.28318**R**= 62.95856 M2 Answers · Science & Mathematics · 10/04/2008

...perimeter = 2L + 2π r = 600 ---> L + π r = 300 L = length of straight track > = 200 r = radius of semicircular tracks ... = area = πr² + 2rL L + π r = 300 ==> 200 + π r = 300 r = 100/π...

3 Answers · Science & Mathematics · 18/03/2008

...2*pi*

**r**) = 400 for**L**: 2L = 200/(pi***r**)**L**= 31.83/**r**so we plug that into the original equation: (31.83/**r**... in mind the limitations on the track . Hope you can take it from here.2 Answers · Science & Mathematics · 16/04/2008

...up a little, its length will be

**L**+D. At this point, it ... as an arc of a circle with radius**R**and center O. Let... be the two ends of the track , and let @ be the angle AOB in...2 Answers · Science & Mathematics · 31/03/2008

...5.) A rug is 74 years... Let the age of the rug be

**R**, and let the age of the painting be P, since I don't know...6 Answers · Science & Mathematics · 08/03/2008

... * T) + (

**R*** Sx) = bx**L**= Last >>**R*** T = c You would have to keep...systematic and it is easier to keep track of, because you are working with less...1 Answers · Science & Mathematics · 18/02/2008

if your track is circular then it would be 6pi if you go from the inside of 3 to the inside of 5 because 1.5 from 3 to 4 and 1.5 from 4 to 5 so 3 2pi(

**r**) is circumference so 2(3)pi 6pi1 Answers · Science & Mathematics · 15/02/2008

...field right? P = 2(pi)

**r**+ 2L You isolate and get: (pi)**r**= 150 -**L r**= (150-**L**)/(pi); So that's your radius, but if you have 2r, then...2 Answers · Science & Mathematics · 21/11/2007