Question

If two pens cost Rs.20, then what is cost of 30 such pens?

• A. $10$
• B. $300$
• C. $600$
• D. $150$

Answer 1

The correct option is B $300$

It is given that the cost of two pens is Rs.$20$ then cost of one pen will be:

$\frac{20}{2}=10$

Therefore, one pen costs Rs.$10$.

Now, the cost of $30$ pens will be as follows:

Cost$\times$number of pens$=10\times 30=300$

Hence, the cost of $30$ pens is Rs.$300$.