Discussion

Explanation:

Let amount of food consumed by each soldier per day = x kg

The amount of food consumed by 400 soldiers in 100 days = x × 400 × 100
⇒ 40000x = 20 × 1000 kgs

x = 0.5 kg/day

Now, amount of food consumed by 40 soldiers in 20 days = 0.5 × 40 × 20 = 400 kgs.

Hence, option (b).

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