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Question

One kind of cake requires 200g of flour and 25g of fat, and another kind of cake requires 100g of flour and 50g of fat. Find the maximum number of cakes that can be made from 5kg of flour and 1 kg of fat assuming that there is no shortage of the other ingredients used in making the cakes.

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Solution



Let number of first kind of cake is X and another kind of cake is Y.

So, total flour required =200X+100Y g
and total fat required =25X+50Y g

Since, maximum flour available is 5kg=5000g
200X+100Y5000

2X+Y50 ...(1)

Also, maximum fat available is 1kg=1000g
25X+50Y1000

X+2Y40 ...(2)

Since, quantity of cakes can't be negative.
X0,Y0 ...(3)

We have to maximize number of cakes that can be made.

So, Objective function is Z=X+Y

After plotting all the constraints given by equation (1), (2) and (3), we got the feasible region as shown in the image.


Corner points Value of Z=X+Y
A (0,20) 20
B (20,10) 30 (Maximum)
C (25,0) 25
So, maximum cake that can be made is 30, where first kind of cake will be 20 and second kind of cake will be 10.

814551_846983_ans_cf5f456c48f8409d908684c89a4dd539.png

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