Question

Amish bought a number of book 1800ts if she had bought 10 more books for the same amount each book would have cost her 30rsess how many books did she buy originally​

Answer 1

Answer:

Original price is Rs 36/book

Step-by-step explanation:

let the original number of books be X

Bought X number of books for rs 1800

later,

Formula for calculating per book cost

total cost/ number of books.

if Amish add 10 more books, cost remain same which is 1800, but average cost per book changes to 30, so equation would be

1800/(X+10) = 30

by solving this we get X as 50 which is the original number of books.

now original price for book:

=1800/50

=36