Question

the price of a book is increased by 12% if its increase price is rupees 145.60 find the original price​

Answer 1

Answer:

let the original price be x price of book is 12by 100*x increase so,112/100*x is 145.60 answer is130

Answer 2

Question:

The price of a book is increased by 12%. If its increase price is rupees 145.60, find the original price​.

Answer:

The original price was Rs. 130.

Given:

Increased price is 12%.

Price after increase is Rs. 145.60

To find:

Original price of the book.

Explanation:

Let, the original price of the book be, 'n'.

12% of n = 12n/100

               = 3n/25 [∵ Dividing 12 and 100 by 4]

∴ New price of the book =$(n+\frac{3n}{25} )$

                                         =$(\frac{25n+3n}{25} )$ [∵ The L.C.M. of the denominators is 25.]

                                        = $\frac{28n}{25}$

∴ According to the problem:

$\frac{28n}{25} = 145.60$

⇒ 28n = (145.60×25)

⇒ 28n  = 3640

⇒ n = 3640/28

⇒ n = Rs. 130.

∴ The original price of the book was Rs. 130.