Let's solve the problem step by step:

Given:
- 25 bags of wheat each weighing 40 kg cost Rs. 2750.

To find:
- The cost of 35 bags of wheat if each weighing 50 kg.

We can use the concept of proportionality to solve this problem.

Step 1: Finding the cost per bag of wheat
The cost of 25 bags of wheat is Rs. 2750. To find the cost of 1 bag of wheat, we divide the total cost by the number of bags:
Cost per bag = Total cost / Number of bags
Cost per bag = Rs. 2750 / 25
Cost per bag = Rs. 110

Step 2: Finding the cost of 35 bags of wheat
Now that we know the cost per bag of wheat, we can find the cost of 35 bags by multiplying the cost per bag by the number of bags:
Cost of 35 bags = Cost per bag * Number of bags
Cost of 35 bags = Rs. 110 * 35
Cost of 35 bags = Rs. 3850

Therefore, the cost of 35 bags of wheat, each weighing 50 kg, is Rs. 3850.

In summary,
- The cost per bag of wheat is Rs. 110.
- The cost of 35 bags of wheat, each weighing 50 kg, is Rs. 3850.

This solution is based on the assumption that the cost of wheat is directly proportional to the number of bags and the weight of each bag.