Question

Cost of a dozen pen is 240 and cost of 14 pencils is Rs.1 12 find the ratio of the cost of a pen to the cost of a pencil 

Answer 1

Given,

Cost of a dozen pen is $240$ and cost of $14$ pencils is $112$ rupees

We have to find the ratio of a pen to the cost of a pencil

First we have to calculate one pen and one pencil cost

According to the question,

Cost of a dozen pens is $240$

We know that

Dozen $=12$

So,

$12$ pens $= 240$ rupees

$1$ pen $= \frac{240}{12}$

$=20$ rupees

Cost of $14$ pencils is $112$ rupees

$14$ pencils $= 112$ rupees

$1$ pencil $= \frac{112}{14}$

$=8$ rupees

Now,

The ratio of one pen and pencil cost is $20: 8$

$= 5:2$

Therefore, the answer is $5:2$.