Cost of 105 envelopes is Rs 35. How many envelopes can be purchased for Rs 10?

Explanation

To solve the problem step by step, we can follow these calculations:

**Step 1: Determine the cost of one envelope.**
- We know that the cost of 105 envelopes is Rs 35.
- To find the cost of one envelope, we divide the total cost by the number of envelopes:

\[
\text{Cost of one envelope} = \frac{35 \text{ Rs}}{105 \text{ envelopes}} = \frac{1}{3} \text{ Rs/envelope}
...