Question

A book seller gains 30% on the cost price by selling a book for $130.Calculate the cost price of the book.​

Answer 1

Answer:

Let the cost price be x

• Selling price, S.P. = 130
• Gain % = 30%

$\rm{C.P. = \dfrac{S.P. \times 100}{100+ gain \% }}$

$\rm{C.P. = \dfrac{130 \times 100}{100+30}}$

$\rm{ C.P. = \dfrac{130}{30} }$

$\large{\boxed{\rm{ C.P. = \dfrac{13}{3}}}}$