Question

The cost of $1$ dozen pens is $Rs.24$. Find the cost of $30$ pens.

Answer 1

Finding cost of $30$ pens:

Cost of $1$dozen i.e., $12$ pens $=Rs.24$

Now, cost of $1$ pen $=\frac{24}{12}=Rs.2$

Cost of $30$ pens $=2\times 30=Rs.60$

Therefore, cost of $30$ pens is $Rs.60$