Question

If 6 pens cost ₹48, then pens can be purchased for ₹240.

• A. 24
• B. 30
• C. 20

Answer 1

The correct option is B 30

The cost of pens is directly proportional to the number of pens.
So,
$\frac{\text{Cost of pens}}{\text{Number of pens}}=\text{Constant}$

Let the number of pens be x.
So,
$\frac{48}{6}$ = $\frac{240}{x}=\text{Constant}$

$\frac{240\times 6}{48}=x$

$x=30\text{pens}$
Therefore, 30 pens can be purchased for ₹240.