Question

5 pens and 1 book together cost rs 225.Cost of 10 pens is equal to cost of 1 book.Find the total cost of 3 pens and 2 books.

Answer 1

so here is ur answer

Answer 2

Let the cost of a pen be p and that of a book be b.

Then :

5p + b = 225

and :

10p = b

Lets substitute this in the first equation as follows :

5p + 10p = 225

15p = 225

p = 15

The cost of a book is thus :

15 × 10 = 150

the cost of 2 books and 3 pens is thus :

3 × 15 + 2 × 150 = 45 + 300 = 345

rs 345