Question

Q1- If S.P of 10 pens is =C.P of 14pens. Fing gain percent.
Q2- By selling a book for ₹258,a bookseller gains 20%. For how much should he sell it to gain 30%.​

Answer 1

Answer:

rice = 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 !

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