The cost of 2 pencils and 3 erasers is Rs. 9 and the cost of 4 pencils and 6 erasers is Rs. 18. Find the cost of each pencil and each eraser.

The total cost of 5 pens and 2 books is Rs. 150, while the total cost of 7 pens and 3 books is Rs. 219. Find the total cost of 3 pens and 1 book.

The total cost of 2 pencils and 3 pens is Rs.31. While the total cost of 3 pencils and 2 pens is Rs.29. Represent this data algebraically and graphically.

From the pair of linear equations in the following problems, and find their solutions graphically: 5 pencils and 7 pens together cost Rs. 50, whereas 7 pencils and 5 pens together cost Rs. 46. Find the cost of one pencil and that of one pen.

The cost of 4 pens and 4 pencil boxes is Rs. 100. Three times the cost of a pen is Rs. 15 more than the cost of a pencil box. Form the pair of linear equations for the above situation. Find the cost of a pen and a pencil box.

Romila went to a stationery shop and purchased 2 pencils and 3 erasers for Rs.9. Her friend Sonali saw the new variety of pencils and erasers with Romila, and she also bought 4 pencils and 6 erasers of the same kind for Rs.18. Represent this situation algebraically and graphically.

Form the pair of linear equations for the problems and find their solution by substitution method: The coach of a cricket team buys 7 bats and 6 balls for Rs. 3800. Later, she buys 3 bats and 5 balls for Rs. 1750. Find the cost of each bat and each ball.

The cost of fencing a circular field at the rate of Rs. 24 per metre is Rs. 5280. The field is to be ploughed at the rate of Rs 0.50 per m^(2) . Find the cost of ploughing the field (Take pi = (22)/(7) )

The internal and external diameters of a hollow hemispherical veseel are 12 cm and 16 cm respectively. If the cost of painting 1 cm^(2) of the surface area is Rs 5.00 find the total cost of painting the vessel all over. (Use pi=3.14)

A wholesale dealer wants to starts the business with Rs. 2,40,000. The cost price of a quintal wheat is Rs. 2000 and the cost price of a quintal rice is Rs. 3000. He has the space capacity for 200 quintals grain. The profit from the sale of one quintal wheat is Rs. 125 and that from one quintal rice is Rs. 200. If he has x quintal rice and y quintal wheat then the objective function for the maximum profit is ............