If 10 pens cost 60 rupees, what is the cost of 13 such pens?​

If 15 pens cost Rs. 35, what is the cost of 39 pens?

If cost of 12 pens is Rs84. then what is the cost of 10 such pens ?

If 8 pens cost Rs. w, find the cost of 5 such pens.

If the cost of 12 pens is ₹ 138, then the cost of 14 such pens is

If the cost of a pen is ₹ 28.50 , find the cost of 48 such pens.

If the cost of a pen is rs. 32.50, find the cost of 24 such pens.

The total cost of 6 books and 7 pens is 79 rupees and the total cost of 7 books and 5 pens is 77 rupees.Find the cost of 1 book and 2 pens.

The total cost of 12 pens and 5 pencils is equal to Rs 111. Also, the cost of 1 pencil is Rs 5 less than the cost of 1 pen. What will be the cost of 8 pens and 9 pencils?

One pencil costs Rs.2 and one fountain pen costs Rs.15. What is the cost of x pencils and y fountain pens?