Question

1. The cost of 6 exercise books is 90. What is the cost of 25 such books?​

Answer 1

Answer:

ANSWER

Given total cost of 5 pens and 10 pencil = Rs 30

5 pens + 10 pencils = 30

pens + 2 pencils = 1

also given pen cost 3 more than a pencil

i.e, pen = 3 + pencil.

pen - pencil = 3

pens + 2 pencils = 6

_______________

-3 pencils = -3

pencils = 1

pen - 1 = 3

pen = 4

cost of pencils = 1    cost of pen = 4

Answer 2

Step-by-step explanation:

cost of 6 books =Rs 90

So,cost of 1 book=90/6=Rs15

The cost of 25 books=15×25=Rs 375

Hope it helps✌️