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A cottage industry manufactures pedestal lamps and wooden shades, each requiring the use of a grinding/cutting machine and a sprayer. It takes 2 hours on the grinding/cutting machine and 3 hours on the sprayer to manufacture a pedestal lamp. It takes 1 hour on the grinding/cutting machine and 2 hours on the sprayer to manufacture a shade. On any day, the sprayer is available for at the most 20 hours and the grinding/cutting machine for at the most 12 hours. The profit from the sale of a lamp is Rs. 25 and that from a shade is Rs. 15. Assuming that the manufacturer can sell all the lamps and shades that he produces, how should he schedule his daily production in order to maximise his profit. Formulate an LPP and solve it graphically.

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A cottage industry manufactures pedestal lamps and wooden shades, each requiring the use of a grinding/cutting machine and a sprayer. It takes 2 hours on grinding/cutting machine and 3 hours on the sprayer to manufacture a pedestal lamp. It takes 1 hour on the grinding/cutting machine and 2 hours on the sprayer to manufacture a shade. On any day, the sprayer is available for at the most 20 hours and the grinding/cutting machine for at die most 12 hours. The profit from the sale of a lamp is Rs 5 and that from a shade is Rs 3. Assuming that the manufacturer can sell all the lamps and shades that he produces, how should he schedule his daily production in order to maximise his profit?

A cottage industry manufactures pedestal lamps and wooden shades, each requiring the use of grinding/cutting machine and a sprayer. It takes 2 hours on the grinding/cutting machine and 3 hours on the sprayer to manufacture a pedestal lamp. It takes one hour on the grinding/cutting machine and 2 hours on the sprayer to manufacture a shade. On any day, the sprayer is available for at the most 20 hours and the grinding/cutting machine for at the most 12 hours. The profit from the sale of a lamp is Rs. 5 and that from a shade is Rs. 3. Assuming that the manufacturer can sell all the lamps and shades that he produces, how should he schedule his daily production in order to maximise his profit? Make an L.P.P. and solve it graphically.

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A factory manufactures two types of screws, A and B. Each type of screw requires the use of two machines, an automatic and a hand operated. It takes 4 minutes on the automatic and 6 minutes on hand operated machines to manufacture a package of screws A, while it takes 6 minutes on automatic and 3 minutes on the hand operated machines to manufacture a package of screws B. Each machine is available for at the most 4 hours on any day. The manufacturer can sell a package of screws A at a profit of 70 paise and screws B at a profit of Rs 1. Assuming that he can sell all the screws he manufactures, how many packages of each type should the factory owner produce in a day in order to maximise his profit? Formulate the above LPP and solve it graphically and determine the maximum profit.

A cottage industry manufactures pedestal lamps and wooden shades.Both the products require machine time as well as craftsman time in the making.The number of hours required for producing 1 unit of each and the corresponding profit is given in the following table: In a day,the factory has availability of not more than 42 hours of machine time and 24 hours of craftsman time. Assuming that all items manufactured are sold,how should the manufacturer schedule his daily production in order to maximise the profit?Formulate it as an LPP and solve it graphically

A manufacturer produces two types of soaps using two machines A and B . A is operated for 2 minutes and B for 3 minutes to manufacture first type , while it takes 3 minutes on machine A and 5 minutes on machine B to manufature second type . Each machine can be operated at the most for 8 hours per day . The two types of soap are sold at a profit of Rs 0.25 and Rs 0.05 each respectively . Assuming that the manufactured can sell all the soaps he can manufacture , how many soaps of each type should be manufature per day so as to maximize his profit .

XII BOARDS PREVIOUS YEAR-BOARD PAPER SOLUTIONS-All Questions
  1. Find the distance of the point P(–1, –5, –10) from the point of int...

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  2. Find the equation of the plane that contains the point (1, – 1, 2) ...

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  3. A cottage industry manufactures pedestal lamps and wooden shades, e...

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  4. Find the shortest distance between the lines l1 and l2 whose vector ...

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  5. Find a unit vector perpendicular to both of the vectors vec a+ vec b ...

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  6. Find a vector in the direction of vector 2 hat i-3 hat j+6 hat k k whi...

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  7. Write the projection of vector hat i+ hat j+ hat k along the vector ...

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  8. Evaluate : int0^pi(xtanx)/(secx+tanx)dx

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  9. Show that a cylinder of a given volume which is open at the top has...

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  10. Find the area of the smaller region bounded by the ellipse (x^2)/9+(y^...

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  11. Write the value of cos^(-1)(-1/2)+2sin^(-1)(1/2)

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  12. Let R="{"a , a^3")":a is a prime number less than 5} be a relation. Fi...

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  13. Evaluate : int0^(pi/4)tanxdx

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  14. Evaluate : int(dx)/(sin^2xcos^2x)

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  15. If A is a3x3 matrix, |A| != 0 and |3A|=k|A| , then write the value of ...

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  16. If (a+4 3b8-6)=(2a b+2 8a-8b), write the value of a-2bdot

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  17. Show that the vectors vec a , vec b , vec c are coplanar if and on...

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  18. Five cards are drawn one by one, with replacement, from a well shuf...

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  19. Find the intervals in which the function f(x)=3/2x^4-4x-45 x+51 is (a)...

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  20. Find the approximate value of f(3. 02), upto 2 places of decimal, whe...

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