Question

a bookseller gains 15%on the cost price by selling it at rs 368.find cp of the book.

Answer 1

Find the percentage that the book was sold:

100 + 15 = 115%

Find the cost price:

115% = Rs 368

1% = 368 ÷ 115 = Rs 3.20

100% = 3.2 x 100 = Rs 320

Answer: The cost price is Rs 320

Answer 2

Solution -

​​We know,

Cost Price [C.P.] = {100/(100+Gain%) × S.P.}  

Sold Price [S.P.] = ₹ 368  

Cost Price [C.P.] = ₹ {100/(100+15) × 368}  

= ₹ {100/115 × 368}  

= ₹ {20/23 × 368}  

= ₹ {20 × 16}  

= ₹ 320    

Explaination -  

A book-seller had sold a book with ₹ 368 and gains 15 %.  

Cost price [C.P.] is the price at which an article is purchased. So, the question is that, at which cost did the buyer bought the book.  

Therefore, by calculations we got ₹ 320 as C.P.    

#Be Brainly