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

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SmaгtieGurL

Answer:

Let the cost price be x

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

[tex]\rm{C.P. = \dfrac{S.P. \times 100}{100+ gain \% }}[/tex]

[tex]\rm{C.P. = \dfrac{130 \times 100}{100+30}}[/tex]

[tex]\rm{ C.P. = \dfrac{130}{30} }[/tex]

[tex]\large{\boxed{\rm{ C.P. = \dfrac{13}{3}}}}[/tex]

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