The total cost of 10 erasers and 5 sharpeners is at least Rs 65. The cost of each eraser cannot exceed Rs 4. Find the minimum possible cost of each sharpener

The total cost of a dozen apples and half a dozen oranges cannot exceed 180.The cost ofeach orange cannot exceed * 5. Find the minimum possible cost of each apple.

The total cost of a score of apples and a dozen of oranges is greater than or equal to ₹ 420. The cost of each apple cannot exceed ₹ 15. Find the minimum possible cost of each orange ( in ₹) ( 1 score = 20).

The cost of 20 metres of ribbon is Rs 335. Find the cost of each metre of it.

The sum of cost of 5 eraser, 3 pencil and 1 pan is Rs. 16. The sum of cost of 2 eraser, 1 pencil and 3 pen is Rs. 19. While the cost of 1 eraser, 2 pencil and 4 pen is Rs. 25. Find cost per unit of eraser, pencil and pen.

The sum of cost of 5 eraser, 3 pencil and 1 pan is Rs. 16. The sum of cost of 2 eraser, 1 pencil and 3 pen is Rs. 19. While the cost of 1 eraser, 2 pencil and 4 pen is Rs. 25. Find cost per unit of eraser, pencil and pen.

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.