Calculus grade 12 Optimisation: Exam

Calculus Grade 12 Optimisation Exam question.
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[@TPE_Mitchell]

I'm not a fan of math, however, the content presented was rather interesting. The presenter also sounds very enthusiastic. Great work, sir 👍.

[@kevinmathscience]

So happy it helped you!

[@mendrewmabuza]

Isn't the 2r in the perimeter supposed to be 2r(2), which equals 4r ? because the length is 2r and we have two lengths, so we have two 2rs. If not, please assist Mr Kevin.

[@LufunoMusetha]

U are wrong is 2r not 4r remember the side of 2r is one we don't count the dot line in othe way perimeter we add given side we hv 3 side to side 2 similarly that why is p=side+side +side=b+b+2r=2b+2r I hope you will understand 🎉

[@GogginsWorld]

Thank you kevin for everthing ❤ . You are actually the reason why i have been the top achiever for both maths and physics in my school.🎉

[@prestonleigh6630]

I LOVE YOU KEVIN !!!!

[@kevinmathscience]

Haha! Thank you!!!! :)

[@madgodyt2391]

i did it . Thank u

[@silindokuhlenoxolo1052]

Hey Kevin can you do more exam questions on calculus application I'm really struggling

[@nkatekomaoke6901]

Hey Kevin... I've been watching your videos since February and my marks have been very pleasing.
Can you please teach Photoelectric effect 🙏and Electro dynamics
Grade 12 Physical Sciences

[@kevinmathscience]

Hello Nkateko, I am very happy it has been helping you! I will not be releasing that content this year 2021 but please check the video description with a link to my online course. It has all the content you are talking about.

[@nhlanhlamngomezulu6740]

Wouldn’t it be 60 = 4r + 2b + pie for perimeter instead of 2r ? Because b became 2b so 2r should become 4r🤷‍♂️

[@premlites.1276]

Hi Kevin, can u please do question 10 from the September kzn trial maths p1

[@Kutloano.Makana]

Thank you so much sir🙏. Which past paper was this question from?

[@nuthingexists9165]

If u have the maths app I think u can find it there

[@vaargynarh7698]

Hey sir where do you teach?

[@kevinmathscience]

Hello, I have an online course which includes live teaching. Check the video description for more info. Also has more videos :)

[@Asra_Fareed]

Hello😊I have an important question.
When you took the derivative of A. You said da/dr
Is it wrong if i say, A' ?
A prime, symbolised A'.
Will the examiner mark me wrong?😢

[@kevinmathscience]

They probably wont mark wrong so would not stress about that :)

[@andilemvalelwa7229]

Hey isn't L=2r which would mean that P=2 (2r)+2b?

[@kevinmathscience]

Because we are only going on the OUTSIDE of the whole shape. So the dotted line does not get included because that is not the outside.

[@jizla9061]

Mensuration??🤔🤔