what is the surface area of a cylinder that has the diameter of 10 and height of 8

Algebra
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what is the surface area of a cylinder that has the diameter of 10 and the height of 8

Apr 26th, 2015

 r = diameter/2 = 10/2 = 5 and h = 8 

Surface Area of a Cylinder = 2 Π r2 + 2 Π r h

                                                 =   2 *3.14*5^2 + 2 * 3.14 * 8

                                                 = 207.24 

Apr 26th, 2015

thanks very much , but i am still not understanding the math . will my answer come back in pi or would it just be 207.24 ..? i have lots of these 

Apr 26th, 2015

ok..  do you want in the pi form 

Apr 26th, 2015

uhmm.. sure if you don't mind . Please


Apr 26th, 2015

Surface Area of a Cylinder = 2 Π r2 + 2 Π r h

                                               = Π ( r^2 + r h )

                                               Π  (5^2 + 5 *8)

                                             = 130Π   

Apr 26th, 2015

I hope you understood 

Apr 26th, 2015

yes i do now thanks .

Apr 26th, 2015

always welcome here dear 

Apr 26th, 2015

do you mind answering more questions or are  you 

busy ??

Apr 26th, 2015

no......  I have time you may ask more question  to me 

Apr 26th, 2015

I will be happy to help you at any time.

Apr 26th, 2015

thank you . how would i set the problem

 up for the surface area of a cone with the radius 28 and the height 32 in pi form ??

Apr 26th, 2015

SA = πr(r + l)   where l  is salient height of the cone     

   l2 = h2 + r2

        = 28^2 + 32^2 

    so  l= 42.52

therefor  SA = π 28(28 + 42.52)= 1974.56 π

Apr 26th, 2015

i can't find the answer .. on my cards 


Apr 26th, 2015

 sry I did't understand ..

 I sent you ans ..

 may be you have to ask  the question directly to me.

Apr 26th, 2015

i have cards that were cut out , and given to me by my teacher the answers are on the sides of the cards . so have to match them up on a paper and glue them they are based on 3d items , volume , and surface area . but i just don't understand how to get the surface area problems exactly into pi form . yes you might give every step but i still little bit do not understand the answer part .

Apr 26th, 2015

where you have to problem  to understand the  ans which i given.

 Plz  tell I will try to explain 

Apr 26th, 2015

a square pyramid with the square having 13 measuring all around on each 4 side and the height of 8

Apr 26th, 2015

  Hello dear this is other question ...

 and what do you want  in this question.

Apr 26th, 2015

what do you mean ??

Apr 26th, 2015

   a square pyramid with the square having 13 measuring all around on each 4 side and the height of 8

 what do you want to find out from this question ?


Apr 26th, 2015

the surface area , lateral


Apr 26th, 2015

ok.... 

 Dimeter of square = (13^2 + 13 ^2)^1/2= 18.38

 r = 18.38/2 = 9.19 

lateral height  l = (9.19^2 +8^2)^1/2 = 12.18

SA = πr(r + l)=  π 9.19(9.19 + 12.18) 

                         =196.39 π 

   

Apr 26th, 2015

 I hope u understand 

Apr 26th, 2015

thanks .


Apr 26th, 2015

 hello dear you pay for only one question  right ?

 I will get a reminder from study pool  that  you solved 3 question and get  money of one question. 

Apr 26th, 2015

yess


Apr 26th, 2015

 don't mind  plz pay for  two question  more.

Apr 26th, 2015

pay for what again ?

Apr 26th, 2015

 if you really satisfied with my ans 

 If you want then pay  for those two additional question  you have asked to me 

Apr 26th, 2015

but i wasn't satisfied with the last 2 , they were wrong . i didn't pay for the 1st one either 


Apr 26th, 2015

hello . dear  both are correct..

 if you need any clarification where you r not understanding  then let me know.

Apr 26th, 2015

they were not correct . either my teacher or you cannot count 

Apr 26th, 2015

what ans I given  to you ..  that submit first if it will be wrong then I will pay  to you 

Apr 26th, 2015

im not paying nothing ,you broke man.

Apr 26th, 2015

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