Question

Cost of a dozen pens is$₹180$ and cost of $8$ ball pens is $₹56$. Find the ratio of the cost of a pen to the cost of a ball pen.

Answer 1

Given that,

Cost of $1$ dozen pens$=$ $₹180$

We know that,

$1$ dozen $=12$ piece

Therefore,

Cost of $12$ pens$=$ $₹180$

Divide both side by $12$

Cost of $1$ pen$=$ $₹\frac{180}{12}=₹15$

Also, cost of $8$ ball pens $=$ $₹56$

Divide both side by $8$

cost of $1$ ball pen $=$ $₹\frac{56}{8}=₹7$

Therefore, ratio of the cost of a pen to the cost of a ball pen$=$$₹15:₹7$$=$$\frac{15}{7}$

Hence, the ratio of the cost of a pen to the cost of a ball pen is $15:7$.