Question

By selling a book for ₹516, a bookseller grains 20%. For how much should he sell it to gain 30%.​

Answer 1

Answer:

₹559

Step-by-step explanation:

let original price of the book be x,

according to given,

=> x + 20x/100 = 516

=> 120x/100 = 516

=> 6x/5 = 516

=> x = 516 × 5/6

=> x = ₹430

Now, to gain profit of 30%,

let selling price be S.P

.: S.P = 430 + 430×30/100

=> S.P = 430 + 129

=> S.P = ₹559

Therefore the answer is ₹559

Answer 2

Step-by-step explanation:

=> Given: selling a book for=₹516 , bookseller gains 20%,for how much he sell to gain 30%.

=> Now,

$cp \: of \: book = sp \times \frac{100}{100 + gain\% } \\ 516 \times \frac{100}{100 + 20 } \\ = > 430 \\ \\ sp \: at \: gain \: of \: 30\% = cp \times \frac{100 + gain\%}{100} \\ = > 430 \times \frac{100 + 30}{100} \\ = > 559$

Hence,SP of book to gain 30% = ₹559

This is your answer..༎ຶ‿༎ຶ