Question

The cost of $7$ pens is $Rs.60$, then find the cost of $5$ pens.

Answer 1

Using unitary method,

$7$ pens $\to$ Rs. $60$

$1$ pen $\to$ Rs. $\frac{60}{7}$

$5$ pens $\to$ Rs. $\frac{60}{7}\times 5=42.86$ Rs.