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Question -

A company manufactures two types of novelty souvenirs made of plywood. Souvenirs of type A require 5 minutes each for cutting and 10 minutes each for assembling. Souvenirs of type B require 8 minutes each for cutting and 8 minutes each for assembling. There are 3 hours 20 minutes available for cutting and 4 hours for assembling. The profit is Rs 5 each for type A and Rs 6 each for type B souvenirs. How many souvenirs of each type should the company manufacture in order to maximize the profit?



Answer -

Let the company manufacture x souvenirs of type A and ysouvenirs of type B respectively

Hence,

x ≥ 0 and y ≥ 0

The given information can be compiled in a table is given below

Type A

Type B

Availability

Cutting (min)

5

8

3 × 60 + 20 = 200

Assembling (min)

10

8

4 × 60 = 240

The profit on type A souvenirs is Rs 5 and on type B souvenirsis Rs 6. Hence, the constraints are

5x + 8y ≤ 200

10x + 8y ≤ 240 i.e.,

5x + 4y ≤ 120

Total profit, Z = 5x + 6y

The mathematical formulation of the given problem can be writtenas

Maximize Z = 5x + 6y …………… (i)

Subject to the constraints,

5x + 8y ≤ 200 ……………. (ii)

5x + 4y ≤ 120 ………….. (iii)

x, y ≥ 0 ………….. (iv)

The feasible region determined by the system of constraints isgiven below

A (24, 0), B (8, 20) and C (0, 25) are the corner points

The values of Z at these corner points are given below

Corner point

Z = 5x + 6y

A (24, 0)

120

B (8, 20)

160

Maximum

C (0, 25)

150

The maximum value of Z is 200 at (8, 20)

Hence, 8 souvenirs of type A and 20 souvenirs of type B shouldbe produced each day to get the maximum profit of Rs 160

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