Explanation:

- Let's denote the original price of wheat per kg as "P" (in Rs).

- A 20% reduction implies the new price is 0.8P.

- With the new price, Ram can buy 5 kg more for Rs 800.

- The equations can be set up as follows:

- At the original price: \( \frac{800}{P} \) kg.

- At the reduced price: \( \frac{800}{0.8P} \) kg.

- The difference is 5 kg: \( \frac{800}{0.8P} - \frac{800}{P} = 5 \).

- Solving this equation:

- Simplifying, \( \frac{800}{0.8P} = \frac{1000}{P} \),

- So, \( \frac{1000}{P} - \frac{800}{P} = 5 \),

- Which simplifies to: \( 200/P = 5 \),

- Therefore, \( P = 40 \).

- ?? Correct Option: Option 4 - 40

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