MATLAB CODE TO FOR THE FOLLWING QUESTION

you are designing a rectangular page to contain 60 inch^2 of printing with a 4 inch margin at the top and bottom and a 2 inch margin at each side. what overall dimensions will minimize the amount of paper used?

[madhan ravi]

Nobody is going to write the code for you.

[Steven Lord]

This sounds like a homework assignment. If it is, show us what you've done to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance.

[ASHOK VARDHAN]

%Solving problem 2
fprintf('Code for problem 2 \n')
area = 60;
syms c b;
c == (60/(b-4)) + 8;
e = c * b;
e= diff(e, b) == 0;
[d]=solve(e);
[a] = [(60/(d(1)-4)) + 8, (60/(d(2)-4)) + 8];
fprintf('Dimensions of page for minimum area is :\n')
if (a(1)<0)
    fprintf('Length : %f\n', a(2))
    fprintf('Breadth : %f\n', d(2))
elseif(a(1)>0 && a(2)>0)
    fprintf('Lenght1 : %f\n', a(1))
    fprintf('Breadth1 : %f\n', d(1))
    fprintf('Length2 : %f\n',a(2))
    fprintf('Breadth2 : %f\n',d(2))
else
    fprintf('Length : %f\n', a(1))
    fprintf('Breadth: %f\n', d(1))
end

sir i have tried but it is showing some error now can you help me

[Geoff Hayes]

Ashok - please copy and paste the full error message to this question. Also, what is the intent behind this line of code

e= diff(e, b) == 0;

?

[Geoff Hayes]

Ashok's answer moved here

this is the error i am getting

Error in solve (line 357)
       warnIfParams(parameters, conditions);
Error in matlab (line 8)
[d]=solve(e);

behind this line e= diff(e, b) == 0; the meaning is to get a an equation by differentiating e with respect to b and solve to it

[Steven Lord]

Ashok, that doesn't look like the full text of the error message. Copy and paste all the text displayed in red. The exact text of the error message likely will be useful in determining the exact cause of the problem and how to correct it.

And just stylistically: while calling your script matlab.m shouldn't cause any problems, I recommend using a more descriptive and more easily discoverable name. Something like codeForProblem2.m would more clearly indicate the code's purpose at a glance in your OS's file system UI.