Explanation:

- To determine the cost, calculate the rectangle's length using the Pythagorean theorem:

$$\text{Length}=\sqrt{{\text{Diagonal}}^2-{\text{Width}}^2}=\sqrt{{53}^2-{28}^2}=\sqrt{2809-784}=\sqrt{2025}=45\text{m}$$

- Calculate the perimeter for fencing:

$$\text{Perimeter}=2(\text{Length}+\text{Width})=2(45+28)=146\text{m}$$

- Fencing cost:

$$15\times 146=2190\text{Rs}$$

- Calculate the area:

$$\text{Area}=\text{Length}\times \text{Width}=45\times 28=1260{\text{m}}^2$$

- Wheat and rice areas using ratio 3:5:

$$\text{Wheat Area}=\frac{3}{8}\times 1260=472.5{\text{m}}^2$$

$$\text{Rice Area}=\frac{5}{8}\times 1260=787.5{\text{m}}^2$$

- Harvesting cost:

$$\text{Wheat}=472.5\times 25=11812.5\text{Rs}$$

$$\text{Rice}=787.5\times 30=23625\text{Rs}$$

- Total cost:

$$2190+11812.5+23625=37627.5\text{Rs}$$

- Therefore, Option 2: 37627.5 is correct.