Question

The cost of $3$ books is $280$ if the price is in ratio of $1:2:4$ find the cost of each book

• A. $40,80,160$
• B. $70,140,280$
• C. $30,60,120$
• D. $20,40,80$

Answer 1

The correct option is A $40,80,160$

The ratio of Books is $1:2:4$

The common factor be $x$

The cost of books is $x,2x,4x$

The cost of all books is $x+2x+4x=2807x=280x=\frac{280}{7}=40$

The cost of books is $40,80,160$