Here in Oklahoma, we are suffering 101-104 degree daysLast month, my Electric bill was $240 for a 2000 sq ft homeMy husband went up into the attic, and says our insulation is quite insufficient, and our $$ is probably going through the roof (literally)We are thinking of buying some blown-in insulation, and doing it ourselvesHave any of you done this? How much of a difference did it make on your utility bills? How much do you think this little diy project will cost us? Sorry so many questions!
I believe that ais 292.02 cm squaredI used 3.14 as pi instead of the pi button on the calculatorb5,802.72 cm squaredI hope i did this correctlyTo find surface area you find the area of a circle which is pi r squaredRadius times radius times pi to find the area of a circleFor a cylinders curved part you find the circumference which is diameter times pi then times the heightAdd the to up to get the surface area.
Surface area of a cylinder area of top + area of bottom + area of sidetop bottom Regular can: Area of top pi radius^2 9 pi square cm Area of sides circumference of circle height 2 pi radius height 6 pi 12.5 75 pi square cm Total surface area 9pi + 9pi + 75pi 93 pi square cm Large can (same method) 324pi + 324pi + 1350pi 1998 pi square centimeters
afind area of two bases and add it to the lateral areaFORMULAS: Api x radius^2 LA perimeter x height (Perimeter/circumference 2 x pi x radius) pi x 3^2 28.27 (multiply by two for second base) 56.55 add 56.55 to the lateral arealateral area perimeter x height (2 x pi x 3) x 12.5 235.62 235.62+56.55 348.72 cm^2 repeat same steps for b.
you want to find the surface are of the cans to see how much aluminum is neededthe formula for the surface area of a cylinder is: 2 pi r^2 + 2 pi r h where r radius and hheight so substitute the numbers for the variables 2 pi 3^2 + 2 pi 312.5 2 pi 9 + 2 pi 37.5 18pi + 75pi 93pi you can leave it like this or simplify it rounding to the nearest hundredth 292.17 do the same thing with the numbers for the party size can 2 pi 18^2 + 2 pi 1837.5 2 pi 324 + 2 pi 675 648pi + 1350pi 1998pi or 6,276.90 ANSWER: a-292.17cm^2 or 93pi cm^2 b- 6,276cm^2 or 1998pi cm^2
The best thing to use is foamWith out seeing the attic I could not tell you if it is possible or notIt should make a big differance.
