Question

by selling a book for rupees 258 a bookseller gains 20% for how much should he sell it to gain 30%?

Answer 1

Price = 258₹

Profit% = 20%

Let's Assume Cost Price = 100₹

Gain% = 20

So Selling Price = 120₹

But the Actual Selling Price = 258₹

= 258 × 100 ÷ 120

= 258 × 5 ÷ 6

= 215 ₹

Now , The Cost Price = 215 ₹

But he wants 30%

Cost Price = 100 ₹

Selling Price = 130 ₹

Cost Price = 215 ₹

Selling Price = ?

= 215 × 130 ÷ 100

= 43 × 13 ÷ 2

= 559 ÷ 2

= 279.5 ₹

Therefore, Selling Price must be 279.5 ₹.

Hope this helps !