Question

9. A bookseller sold a book for Rs. 40.00 to
make a profit of 15% percent. In order to earn
a profit of 20%, he should have sold it for:
LA 17A​

Answer 1

Answer:

He should have sold it for Rs. 41.74.

Step-by-step explanation:

Since we have given that

Selling price of a book = Rs. 40

Profit % = 15%

So, Cost price of a book would be

\begin{gathered}\dfrac{100}{100+15}\times 40\\\\=\dfrac{100}{115}\times 40\\\\=Rs.\ 34.78\end{gathered}

100+15

100

×40

=

115

100

×40

=Rs. 34.78

if profit% = 20%

So, Selling price would be

\begin{gathered}\dfrac{100+20}{100}\times 34.78\\\\=\dfrac{120}{100}\times 34.78\\\\=41.74\end{gathered}

100

100+20

×34.78

=

100

120

×34.78

=41.74

Hence, he should have sold it for Rs. 41.74